Unacademy Mock paper 2

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Environmental Issues
Sub concept: Air Pollution and Its Control
Concept field: Controlling Vehicular Air Pollution
1. Which statement is correct for Electrostatic precipitator
a. It remove over 99 per cent particulate matter present in the exhaust from a
thermal power plant
b. The velocity of air between the plates must be high enough to allow the dust to
fall.
c. It has electrode wires that are maintained at several thousand volts, which
produce a corolla that releases electrons.
d. These electrons attach to dust particles giving them a net neutral charge

Correct Option: a
Solution: The electrostatic precipitator which canremove over 99 per cent particulate matter
present in the exhaust from a thermal power plant. It has electrode wires that are maintained at
several thousand volts, which produce a corona that releases electrons. These electrons attach to
dust particles giving them a net negative charge. The collecting plates are grounded and attract
the charged dust particles. The velocity of air between the plates must be low enough to allow
the dust to fall.
(https://www.studyrankersonline.com/24475/how-does-electrostatic-precipitator-work)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Chemical Coordination and Integration
Sub concept: Mode Of Action of Hormones
Concept field: Mode Of Hormone Action Through Intracellular Receptors
2. ---------------------- interact with intracellular receptors mostly regulate gene expression or
chromosome function by the interaction of hormone-receptor complex with the genome.
a. estradiol
b. glucagon
c. epinephrine
d. glucagon

Correct Option: a
Solution - Hormones which interact with intracellular receptors (e.g., steroid hormones,
iodothyronines, etc.) mostly regulate gene expression or chromosome function by the interaction
of hormone-receptor complex with the genome.
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Biodiversity & Conservation
Sub concept: Biodiversity Conservation
Concept field: How Do We Conserve Biodiversity?
3. India has also a history of religious and cultural traditions that emphasised protection of nature.
In many cultures, tracts of forest were set aside, and all the trees and wildlife within were
venerated and given total protection. Such sacred groves are found in ---------
a. Khasi and Jaintia in Madhya Pradesh
b. Aravalli Hills of Rajasthan,
c. Western Ghat regions of Chanda
d. the Sarguja and Bastar Hills in Meghalaya

Correct Option: b
Solution: sacred groves are found in Khasi and JaintiaHills in Meghalaya, Aravalli Hills of
Rajasthan, Western Ghat regions of Karnataka and Maharashtra and the Sarguja, Chanda and
Bastar areas of Madhya Pradesh.

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Neural Control & Co-ordination
Sub concept: Brain
Concept field: Midbrain
4. A canal called the ------------ passess through the midbrain
a. Broca’s area
b. Wernicke’s area
c. Anterior Choroid Plexus
d. Cerebral aqueduct.

Correct Option: d
Solution: The midbrain is located between the thalamus/hypothalamus of the forebrain and pons
of the hindbrain. A canal called the cerebral aqueduct passes through the midbrain.
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Ecosystem
Sub concept: Productivity
Concept field: Secondary Productivity
5. ----------------- is the rate of formation of new organic matter by consumers.
a. Gross Primary productivity
b. Primary productivity
c. Secondary productivity
d. Net primary productivity

Correct Option: c
Solution: Secondary productivity is defined as the rate of formation of new organic matter by
consumers.

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Structural Org. in Animals
Sub concept: Animal Tissues
Concept field: Muscle Tissue
6. Each organised skeletal muscle in our body is made of a number of muscle bundles held
together by a common collagenous connective tissue layer called ----------
a. Fascicles
b. Sarcolemma
c. Fascia
d. Myofibril

Correct Option: c
Solution: Each organised skeletal muscle in our body is made of a number of muscle bundles or
fascicles held together by a common collagenous connective tissue layer called fascia. Each
muscle bundle contains a number of muscle fibres.
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Ecosystem
Sub concept: Components Of Eco System
Concept field: Biotic Components
7. In the aquatic environment, the sediment-characteristics often determine the type of ----------
that can thrive there.
a. tuna fish
b. benthic animals
c. strychnine
d. warblers

Correct Option: b
Solution: Various characteristics of the soil such as soil composition, grain size and aggregation
determine the percolation and water holding capacity of the soils. These characteristics along
with parameters such as pH, mineral composition and topography determine to a large extent the
vegetation in any area. This in turn dictates the type of animals that can be supported. Similarly,
in the aquatic environment, the sediment-characteristics often determine the type of benthic
animals that can thrive there.
(https://brainly.in/question/15905074)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Excretion
Sub concept: Urine Formation
Concept field: Glomerular Filtration or Ultra filtration Of Blood
8. NaCl transported by the ------------ of Henle’s loop which is exchanged with the --------------of
vasa recta.
a. ascending limb , ascending limb
b. descending limb , ascending limb
c. descending limb , descending limb
d. ascending limb , descending limb

Correct Option: d
Solution: - NaCl is transported by the ascending limb of Henle’s loop which is exchanged with
the descending limb of vasa recta.
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Biotechnology & Applications
Sub concept: Biotechnological Applications in Medicine
Concept field: Gene Therapy
9. In Gene therapy , A functional ADA ( adenosine deaminase ) ----------- (using a retroviral
vector) is then introduced into the lymphocytes, which are subsequently returned to the patient.
a. DNA
b. cDNA
c. mRNA
d. dsDNA

Correct Option: b
Solution: As a first step towards gene therapy, lymphocytes from the blood of the patient are
grown in a culture outside the body. A functional ADA cDNA (using a retroviral vector) is then
introduced into these lymphocytes, which are subsequently returned to the patient.
(https://www.toppr.com/ask/question/describe-the-gene-therapy-produce-for-an-adadeficient-
patient/)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Strategies of Enhancement
Sub concept: Plant Breeding
Concept field: Plant Breeding for Improved Food Quality
10. --------------------prevents early exhaustion of fertility of soil
a. Conventional breeding
b. Micropropagation
c. Genetic modification
d. Somatic Hybridization

Correct Option: c
Solution: Genetic modification has:
(i) made crops more tolerant to abiotic stresses (cold, drought, salt, heat).
(ii) reduced reliance on chemical pesticides (pest-resistant crops).
(iii) helped to reduce post harvest losses.
(iv) increased efficiency of mineral usage by plants (this prevents early exhaustion of fertility of
soil).
(https://www.toppr.com/ask/question/write-any-two-uses-of-genetically-modified-plants/)
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Excretion
Sub concept: Urine Formation
Concept field: Glomerular Filtration or Ultrafiltration of Blood
11. On an average, 1100-1200 ml of blood is filtered by the kidneys per minute which constitute
roughly -------------- th of the blood pumped out by each ventricle of the heart in a minute.
a. 1/5
b. 2/3
c. ¼
d. 3/5

Correct Option: a
Solution: On an average, 1100-1200 ml of blood is filtered by the kidneys per minute which
constitute roughly 1/5th of the blood pumped out by each ventricle of the heart in a minute.
(https://www.toppr.com/ask/question/glomerular-filtrate-contains-glucose-incomparison-to-plasma/)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Body Fluids & Circulation
Sub concept: Blood
Concept field: Formed Elements - Leucocytes
12. ------------- secrete histamine, serotonin, heparin, etc., and are involved in inflammatory
reactions.
a. Neutrophils
b. eosinophils
c. Basophils
d. Monocytes

Correct Option: c
Solution: Neutrophils and monocytes (6-8 per cent) are phagocyticcells which destroy foreign
organisms entering the body. Basophils secrete histamine, serotonin, heparin, etc., and are
involved in inflammatory reactions. Eosinophils (2-3 per cent) resist infections
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Digestion & Absorption
Sub concept: Absorption Of Digested Products
Concept field: Absorption Of Fat
13. Fats are absorbed through lymph in the------------ present in the intestinal villi.
a. chyme
b. Sphincter of Boyden
c. Lacteals
d. Van Kupffer cells

Correct Option: c
Solution: Fats are absorbed through lymph in the lacteals present in the intestinal villi.

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Body Fluids & Circulation
Sub concept: Heart
Concept field: Cardiac Cycle
14. In amphibians and reptiles, the --------------- receives oxygenated blood from the gills/lungs/skin
a. Right Ventricle
b. Right Atrium
c. Left ventricle
d. Left Atrium

Correct Option: d
Solution: - In amphibians and reptiles, the left atriumreceives oxygenated blood from the
gills/lungs/skin and the right atrium gets the deoxygenated blood from other body parts.
However, they get mixed
up in the single ventricle which pumps out mixed blood (incomplete double circulation).
(https://www.examfear.com/notes/Class-11/Biology/Body-Fluids-Circulation/3050/Circulatory-
pathways.htm)
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Body Fluids & Circulation
Sub concept: Heart
Concept field: Heart Sound
15. The first heart sound (lub) is associated with the closure of the tricuspid and -------- whereas the
second heart sound (dub) is associated with the closure of the -------------
a. Bicuspid valves , Semilunar valves
b. Semilunar valves , Tricuspid valves
c. Bicuspid valves ,SAN
d. Semilunar valves , Bicuspid valves

Correct Option: a
Solution: - During each cardiac cycle two prominent sounds are produced which can be easily
heard through a stethoscope. The first heart sound (lub) is associated with the closure of the
tricuspid and bicuspid valves whereas the second heart sound (dub) is associated with the closure
of the semilunar valves. These sounds are of clinical diagnostic significance.
(https://www.examfear.com/notes/Class-11/Biology/Body-Fluids-Circulation/3052/Cardiac-cycle.htm)

Question Type: NEET

Difficulty of question: Hard
Expected time to solve: 60 sec
Concept: Biotechnology & Applications
Sub concept: Biotechnology: Principles and Processes
Concept field: Tools Of Recombinant Dna Technology - Cloning Vectors
16. We can ligate a foreign DNA at the ----------site of tetracycline resistance gene in the vector
pBR322.
a. Pst I
b. BamH I
c. Cla I
d. Pvu II

Correct Option: b
Solution: E. coli cloning vector pBR322 showing restriction sites (Hind III, EcoR I, BamH I, Sal
I, Pvu II, Pst I, Cla I), ori and antibiotic resistance genes (ampR and tetR). rop codes for the
proteins involved in the replication of the plasmid. You can ligate a foreign DNA at the BamH I
site of tetracycline resistance gene in the vector pBR322. The recombinant plasmids will lose
tetracycline resistance due to insertion of foreign DNA
(https://doubtnut.com/ncert-class-12-biology-chapter-11-biotechnology-principles-and-processes)
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Biotechnology & Applications
Sub concept: Biotechnology: Principles and Processes
Concept field: Processes Of Recombinant Dna Technology - Insertion of Recombinant Dna into
the Host Cell/Organism
17. The presence of a chromogenic substrate gives ----------- colonies if the plasmid in the bacteria
does not have an insert.
a. Light Orange coloured
b. Saffron coloured
c. Blue coloured
d. Transparent

Correct Option: c
Solution: - The presence of a chromogenic substrate gives bluecoloured colonies if the plasmid
in the bacteria does not have aninsert. Presence of insert results into insertional inactivation of
the  galactosidase gene and the colonies do not produce any colour,these are identified as
recombinant colonies.
(https://www.toppr.com/ask/question/during-insertional-inactivation-the-presence-of-a-chromogenic-
substrate-gives/)

Question Type: NEET

Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Neural Control & Co-ordination
Sub concept: Brain
Concept field: Hindbrain
18. Pneumotaxic centre centre present in the ----------- region of the brain can moderate the
functions of the respiratory rhythm centre
a. Pons
b. Medulla
c. Crura Cerebri
d. Thalamus

Correct Option: a
Solution: A specialised centre present in the medulla region of the brain called respiratory
rhythm centre is primarily responsible for this regulation. Another centre present in the pons
region of the brain
called pneumotaxic centre can moderate the functions of the respiratory rhythm centre.
(https://www.studyadda.com/ncert-solution/11th-biology-breathing-and-exchange-
gases_q7/419/29487)
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Breathing & Exchange of Gases
Sub concept: Mechanism of Breathing
Concept field: Respiratory Volumes and Capacities
19. Total volume of air a person can expire after a normal inspiration is termed as -------------
a. Inspiratory Capacity
b. Functional Residual Capacity
c. Expiratory Capacity
d. Expiratory Reserve Volume

Correct Option: c
Solution: Expiratory Capacity (EC): Total volume of air a person can expire after a normal
inspiration. This includes tidal volume and expiratory reserve volume (TV+ERV).

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Microbes in Human Welfare
Sub concept: Microbes in Human Welfare
Concept field: Microbes In Industrial Products - Chemicals, Enzymes And Other Bioactive
Molecules
20. -------------are used in detergent formulations and are helpful in removing oily stains from the
laundry.
a. Pectinase
b. Protease
c. Clostridium butylicum
d. Lipases

Correct Option: d
Solution: Microbes are also used for production of enzymes. Lipases are used in detergent
formulations and are helpful in removing oily stains from the laundry.
(https://www.studyadda.com/ncert-solution/12th-biology-microbes-in-human-welfare/439/35789)
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Microbes in Human Welfare
Sub concept: Microbes in Human Welfare
Concept field: Microbes As Biocontrol Agents
21. An example of microbial biocontrol agents that can be introduced in order to control butterfly
caterpillars is the ----------------
a. Trichoderma
b. Nucleopolyhedrovirus
c. Ladybird beetle
d. Bacillus thuringiensis

Correct Option: d
Solution: An example of microbial biocontrol agents that can be introduced in order to control
butterfly caterpillars is the bacteria Bacillusthuringiensis (often written as Bt ). These are
available in sachets as dries pores which are mixed with water and sprayed onto vulnerable
plants such as brassicas and fruit trees, where these are eaten by the insectlarvae. In the gut of the
larvae, the toxin is released and the larvae get killed. The bacterial disease will kill the
caterpillars, but leave other insects unharmed
(https://www.toppr.com/ask/question/a-microbial-biocontrol-agent-that-can-be-used-to-control-
butterfly-caterpillars-is/)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Digestion & Absorption
Sub concept: Alimentary Canal
Concept field: Structure Of Human Gut
22. The opening of the stomach into the ---------- is guarded by the pyloric sphincter.
a. Jejunum
b. Ileum
c. Duodenum
d. Caecum

Correct Option: c
Solution: Small intestine is distinguishable into three regions, a ‘C’ shaped duodenum, a long
coiled middle portion jejunum and a highly coiled ileum.The opening of the stomach into the
duodenum is guarded by the pyloric sphincter. Ileum opens into the large intestine.
(https://www.toppr.com/ask/question/read-following-statements-carefullya-caecum-is-blind-sac-
which-hosts-some-symbiotic-microorganismb-a-narrow/)
(https://www.neetprep.com/subject/U3ViamVjdDo1Ng==/topic/VG9waWM6NzA4/doubt/RG91
YnQ6MTU5NTQ=)
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Digestion & Absorption
Sub concept: Absorption Of Digested Products
Concept field: Concept
23. Absorption is the process by which the end products of digestion pass through the intestinal
--------------- into the blood or lymph.
a. Serosa
b. Mucosa
c. Sub Muscularis
d. Sub Mucosa

Correct Option: b
Solution - Absorption is the process by which the end products of digestion pass through the
intestinal mucosa into the blood or lymph. It is carried out by passive, active or facilitated
transport mechanisms.
(https://www.toppr.com/ask/question/food-is-absorbed-in-the-state-when-it-may-be/)

Question Type: NEET

Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Strategies of Enhancement
Sub concept: Animal Husbandry
Concept field: Management of Farms and Farm Animals - Dairy Farm Management
24. -------------------------------- is the best breeding method for animals that are below average in
productivity in milk production and growth rate in beef cattle.
a. Inbreeding
b. Out-breeding
c. Out-crossing
d. Cross-breeding

Correct Option: c
Solution: - Out-crossing is the practice of mating of animals within the same breed, but having
no common ancestors on either side of their pedigree up to 4-6 generations. The offspring of
such a mating is known as an out-cross. It is the best breeding method for animals that are below
average in productivity in milk production, growth rate in beef cattle, etc. A single outcross often
helps to overcome inbreeding depression.
(https://www.shaalaa.com/question-bank-solutions/explain-out-breeding-out-crossing-cross-breeding-
practices-normal-husbandry-animal-husbandry_19607)
 Question Type: NEET
Difficulty of question: Hard
Expected time to solve: 60 sec
Concept: Strategies of Enhancement
Sub concept: Plant Breeding
Concept field: Plant Breeding for Disease Resistance
25. Resistance to yellow mosaic virus in Abelmoschus esculentus was genetically transferred from
a wild species , this resulted in a new variety called --------------------
a. Pusa Snowball K-1
b. Pusa swarnim
c. Pusa Gaurav
d. Parbhani krant

Correct Option: d
Solution: Several wild relatives of different cultivated species of plants have been shown to have
certain resistant characters but have very low yield. Hence, there is a need to introduce the
resistant genes into the high-yielding cultivated varieties. Resistance to yellow mosaic virus in
bhindi (Abelmoschus esculentus) was transferred from a wild species and resulted in a new
variety of A. esculentus called Parbhani kranti.

Question Type: NEET

Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Plant Growth & Development
Sub concept: Plant Growth Regulators
Concept field: Physiological Effects of Plant Growth Regulators - Ethylene
26. H.H. Cousins (1910) confirmed the release of a volatile substance from--------- oranges that
hastened the ripening of stored ------------------ bananas.
a. Ripened , ripened
b. Unripened , ripened
c. Ripened ,Unripened
d. Unripened , unripened

Correct Option: c
Solution: H.H. Cousins (1910) confirmed the release of a volatile substance fromripened oranges
that hastened the ripening of stored unripened bananas. Later this volatile substance was
identified as ethylene, a gaseous PGR.
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve:45 sec
Concept: Plant Growth & Development
Sub concept: Plant Growth Regulators
Concept field: Physiological Effects of Plant Growth Regulators - Gibberellins
27. With regards to seed dormancy , Effect of inhibitory substances can be removed by subjecting
the seeds to chilling conditions or by application of certain chemicals like ---------------- and
nitrates.
a. 2, 4-dichlorophenoxyacetic
b. abscission II
c. dormin
d. gibberellic acid

Correct Option: d
Solution: - Effect of inhibitory substances can be removed by subjecting the seeds to chilling
conditions or by application of certain chemicals like gibberellic acid and nitrates. Changing the
environmental conditions, such as light and temperature are other methods to overcome seed
dormancy.
(https://www.toppr.com/ask/question/choose-the-correct-answer-from-the-alternatives-
givendormancy-in-seeds-and-budscan-be-broken-by/)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Human Health & Diseases
Sub concept: Common Diseases in Humans
Concept field: Helminthic Diseases
28. Different species of Plasmodium are responsible for different types of malaria , Of these,
malignant malaria caused by --------------- is the most serious one.
a. Plasmodium vivax,
b. Plasmodium malaria
c. Plasmodium falciparum
d. Plasmodium Culex

Correct Option: c
Solution:– Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are
responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium
falciparum is the most serious one and can even be fatal.
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Human Health & Diseases
Sub concept: Types of Immunity
Concept field: Allergies
29. Allergy is due to the release of ------------------ from the mast cells.
a. Cytokine
b. Histamine
c. Serotonin
d. Both b and c

Correct Option: d
Solution- Common examples of allergens aremites in dust, pollens, animal dander, etc.
Symptoms of allergic reactioninclude sneezing, watery eyes, running nose and difficulty in
breathing.Allergy is due to the release of chemicals like histamine and serotonin from the mast
cells
(https://doubtnut.com/question-answer-biology/assertion-symptoms-of-the-allergic-reactions-include-
sneezing-watery-eyes-running-nose-and-difficult-42228645)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Microbes in Human Welfare
Sub concept: Microbes in Human Welfare
Concept field: Microbes In Industrial Products - Fermented Beverages
30. Yeasts poison themselves to death when the concentration of alcohol reaches about ------------
per cent.
a. 10
b. 19
c. 13
d. 15

Correct Option: c
Solution- In both lactic acid and alcohol fermentation not much energy is released; less
than seven per cent of the energy in glucose is released and not all of it is trapped as high
energy bonds of ATP. Also, the processes are hazardous – either acid or alcohol is
produced. Yeasts poison themselves to death when the concentration of alcohol reaches about 13
per cent
(https://www.easytutorial.in/question/15832)
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Respiration in Plants
Sub concept: Aerobic Respiration
Concept field: Krebs Cycle
31. Ubiquinone receives reducing equivalents via complex II that is generated
during oxidation of ------------------------ in the Citric acid cycle.

a. Succinate
b. α-ketoglutaric acid
c. Isocitrate
d. Oxaloacetic acid

Correct Option: a
Solution – Ubiquinone receives reducing equivalents via FADH2 (complex II) that is generated
during oxidation of succinate in the citric acid cycle. The reduced ubiquinone (ubiquinol) is then
oxidised with the transfer of electrons to cytochrome c via cytochrome bc1 complex (complex
III).
(https://www.toppr.com/ask/question/which-of-the-following-depicts-the-sequence-of-cytochromes-
in/)

Question Type: NEET

Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Evolution
Sub concept: Hardy - Weinberg Principle
Concept field: Significance of Hardy - Weinberg Principle
32. A Population is in Hardy Weinberg Equilibrium for a gene with only two alleles.If the gene
frequency of allele “A” is 0.4 ,then the genotype frequency of Aa is
a. 0.21
b. 0.24
c. 0.48
d. 0.44

Correct Option: c
Solution :- According to Hardy Weinberg Equilibrium principle p +q = 1
Here ,p= A ,q= a
Allelic frequency of a = 1 - 0.4 = 0.6
Hence allelic frequency of Aa = 0.6 X 0.4 = 0.24
According to binomial expression , AA2 +2Aa +aa2
The frequency of genotype Aa will be 2 X 0.24 = 0.48
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Evolution
Sub concept: What Are the Evidences for Evolution?
Concept field: Morphological and Anatomical Evidences
33. Which of the following statements is incorrect
a. By the time of 500 mya, invertebrates were formed and active.
b. Jawless fish probably evolved around 450 mya.
c. Sea weeds and few plants existed probably around 320 mya.
d. The first organisms that invaded land were plants.

Correct Option: b
Solution- Jawless fish probably evolved around 350 mya.

Question Type: NEET

Difficulty of question: Hard
Expected time to solve:60 sec
Concept: Respiration in Plants
Sub concept: Aerobic Respiration
Concept field: Electron Transport System (Ets)
34. The whole scheme of transfer of electrons, starting from the PS II, --------------- to the acceptor,
down the electron transport chain to PS I, excitation of electrons, transfer to another acceptor,
and finally ---------------to NADP+ reducing it to NADPH + H+ is called the Z scheme
a. down hill ,uphill
b. uphill , uphill
c. downhill , down hill
d. uphill , down hill

Correct Option: d
Solution - This whole scheme of transfer of electrons, starting from the PS II,
uphill to the acceptor, down the electron transport chain to PS I, excitation of electrons,
transfer to another acceptor, and finally down hill to NADP+ reducing it to
NADPH + H+ is called the Z scheme, due to its characterstic shape .This shape is formed when
all the carriers are placed in a sequence on a redox potential scale.
(https://www.toppr.com/ask/question/which-one-is-involved-in-zscheme-of-photosynthesis/)
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Photosynthesis
Sub concept: Mechanism of Photosynthesis
Concept field: C4 Pathway
35. In Hatch and Slack pathway , mesophyll cells lack ----------------- enzyme.
a. PEPcase.
b. RuBisCO
c. RUBPcarboxydismutase
d. Phosphokinase

Correct Option: b
Solution - The primary CO2 acceptor is a 3-carbon molecule phosphoenol pyruvate (PEP) and is
present in the mesophyll cells. The enzyme responsible for this fixation is PEP carboxylase or
PEPcase. It is important to register that the mesophyll cells lack RuBisCO enzyme. The C4 acid
OAA is formed in the mesophyll cells.
(https://www.topperlearning.com/answer/which-is-the-primary-co2-acc/ejihp1rr)

Question Type: NEET

Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Inheritance & Variance
Sub concept: Mutation
Concept field: Chromosomal Mutation
36. --------------- based on his work on evening primrose brought forth the idea of mutations
a. Thomas Malthus
b. Lamarck
c. Darwin
d. Hugo deVries

Correct Option: d
Solution - Mendel had talked of inheritable 'factors' influencing phenotype, Darwin either
ignored these observations or kept silence. In the first decade of twentieth century, Hugo deVries
based on his work on evening primrose brought forth the idea of mutations – large difference
arising suddenly in a population. He believed that it is mutation which causes evolution and not
the minor variations (heritable) that Darwin talked about.
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve:45 sec
Concept: Molecular Basis of Inheritance
Sub concept: Transcription
Concept field: Transcription Unit
37. The accessibility of promoter regions of prokaryotic DNA is in many cases regulated by the
interaction of proteins with sequences termed ----------------
a. Operons
b. Operators
c. Promoter
d. Repressor

Correct Option: b
Solution - In a transcription unit, the activity of RNA polymerase at a given promoter is in turn
regulated by interaction with accessory proteins, which affect its ability to recognise
start sites. These regulatory proteins can act both positively (activators) and negatively
(repressors). The accessibility of promoter regions of prokaryotic DNA is in many cases
regulated by the interaction of proteins with sequences termed operators. The operator region is
adjacent to the
promoter elements in most operons and in most cases the sequences of the operator bind a
repressor protein.
(https://www.toppr.com/ask/question/the-predominant-site-for-control-of-gene-expression-in-
prokaryotes/)
 Question Type: NEET
Difficulty of question: Hard
Expected time to solve: 60 sec
Concept: Molecular Basis of Inheritance
Sub concept: Human Genome Project
Concept field: Salient Features of Human Genome
38. If an inheritable mutation is observed in a population at high frequency, it is referred to as
----------------------
a. Sequence Annotation
b. Single nucleotide polymorphism
c. Expressed Sequence Tags
d. DNA polymorphism

Correct Option: d
Solution - Allelic sequence variation
has traditionally been described as a DNA polymorphism if more than one variant (allele) at a
locus occurs in human population with a frequency greater than 0.01. In simple terms, if an
inheritable mutation is observed in a population at high frequency, it is referred to as DNA
polymorphism. The probability of such variation to be observed in noncoding DNA sequence
would be higher as mutations in these sequences may not have any immediate effect/impact in an
individual’s reproductive ability
(https://doubtnut.com/question-answer-biology/if-an-inheritable-mutation-is-observed-in-a-
population-at-high-frequency-it-is-referred-as-41591903)

Question Type: NEET

Difficulty of question: Hard
Expected time to solve: 60 sec
Concept: Molecular Basis of Inheritance
Sub concept: RNA World
Concept field: Types of Rna
39. The presence of introns is reminiscent of antiquity, and the process of ----------------represents the
dominance of RNA-world
a. Capping
b. Splicing
c. Tailing
d. Split –gene

Correct Option: b
Solution - The split-gene arrangements represent probably an ancient feature of the genome. The
presence of introns is reminiscent of antiquity, and the process of splicing represents the
dominance of RNA-world. In recent times, the understanding of RNA and RNA-dependent
processes in the living system have assumed more importance.
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Mineral Nutrition
Sub concept: Essential Mineral Elements
Concept field: Criteria for Essentiality
40. -------------------- helps to maintain the ribosome structure.
a. Iron
b. Nitrogen
c. Magnesium
d. Copper

Correct Option: c
Option: Magnesium is a constituent of the ring structure of chlorophyll and helps to maintain the
ribosome structure.

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Mineral Nutrition
Sub concept: Metabolism of Nitrogen
Concept field: Nodule Formation
41. The microbe, ---------------------- produces nitrogen-fixing nodules on the roots of nonleguminous
plants e.g., Alnus
a. Rhizobium
b. Beijerinckia
c. Frankia
d. Pseudomonas

Correct Option: c
Solution - Frankia, also produces nitrogen-fixing nodules on the roots of nonleguminous
plants (e.g., Alnus). Both Rhizobium and Frankia are freeliving in soil, but as symbionts, can fix
atmospheric nitrogen.
(https://www.studyadda.com/notes/upsc/biology/mineral-nutrition/mineral-nutrition/11136)
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve:45 sec
Concept: Molecular Basis of Inheritance
Sub concept: Search For Genetic Material
Concept field: Properties Of Genetic Material (Dna Versus Rna)
42. Select the incorrect statement
a. RNA was the first genetic material.
b. Essential life processes (such as metabolism, translation, splicing, etc.), evolved
around RNA.
c. RNA used to act as a genetic material as well as a catalyst
d. RNA being a catalyst was reactive and hence stable.

Correct Option: d
Solution - RNA was the first genetic material. There is now enough evidence to suggest that
essential life processes (such as metabolism, translation, splicing, etc.), evolved around RNA.
RNA used to act as a genetic material as well as a catalyst (there are some important biochemical
reactions in living systems that are catalysed by RNA catalysts and not by protein
enzymes). But, RNA being a catalyst was reactive and hence unstable. Therefore, DNA has
evolved from RNA with chemical modifications that make it more stable.
DNA being double stranded and having complementary strand further resists changes by
evolving a process of repair.
(https://doubtnut.com/question-answer-biology/the-first-genetic-material-could-be-28381441?
ispopup=true)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Mineral Nutrition
Sub concept: Mechanism Of Absorption of Elements
Concept field: Concept
43. The chief sinks for the mineral elements are -------------
a. the apical and lateral meristems,
b. Developing flowers, fruits and seeds
c. senescing leaves
d. both a and b

Correct Option: d
Solution - The chief sinks for the mineral elements are the growing regions of theplant, such as
the apical and lateral meristems, young leaves, developing flowers, fruits and seeds, and the
storage organs
(https://www.studyadda.com/ncert-solution/11th-biology-transportation-in-animals-plants/411/34690)
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Transport in Plants
Sub concept: Means Of Transport
Concept field: Diffusion
44. Select the correct statements
a. Diffusion is a slow process and is dependent on a ‘living system’.
b. The diffusion of any substance across a membrane depends on its solubility in
carbohydrates
c. In facilitated diffusion special proteins help move substances across membranes
with expenditure of ATP energy.
d. Facilitated diffusion cannot cause net transport of molecules from a low to a
high concentration

Correct Option: d
Solution - Diffusion is a slow process and is not dependent on a ‘living system’. Diffusion is
obvious in gases and liquids. The diffusion of any substance across a membrane also depends on
its solubility in lipids, the major constituent of the membrane. In facilitated diffusion special
proteins help move substances across membranes without expenditure of ATP energy. Facilitated
diffusion cannot cause net transport of molecules from a low to a high concentration – this would
require input of energy.
(https://www.toppr.com/ask/question/what-is-correct-about-the-movement-of-substance-across-the-
membrane-in-facilitated-diffusion/)
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve:45 sec
Concept: Molecular Basis of Inheritance
Sub concept: Search For Genetic Material
Concept field: Properties Of Genetic Material
45. “The behaviour of chromosomes was parallel to the behaviour of genes “ This was noted by
a. de Vries, Correns and von Tschermak
b. Walter Sutton and Theodore Boveri
c. Thomas Hunt Morgan
d. Alfred Sturtevant

Correct Option: b
Solution – Alfred Sturtevant used the frequency of recombination between gene pairs on the
same chromosome as a measure of the distance between genes and ‘mapped’ their position on
the chromosome. Morgan worked with the tiny fruit flies, Drosophila melanogaster which were
found very suitable for such studies. They could be grown on simple synthetic medium in the
laboratory. They complete their life cycle in about two weeks, and a single mating could produce
a large number of progeny flies. Walter Sutton and Theodore Boveri noted that the behaviour of
chromosomes was parallel to the behaviour of genes and used chromosome movement to explain
Mendel’s laws. In 1900, three Scientists (de Vries, Correns and von Tschermak) independently
rediscovered Mendel’s results on the inheritance of characters.
(https://www.toppr.com/ask/question/who-used-in-frequency-of-recombination-between-gene-pairs-
on-the-same-chromosome-as-a/)
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Inheritance & Variance
Sub concept: Sex Determination
Concept field: Haploid Diploid Method
46. Select the correct statement
a. In Honey bee , the males do not have father and thus cannot have sons, but
have a grandfather and can have grandsons
b. It is the genetic makeup of the egg that determines the sex of the child.
c. In Drosophila the females have one X and one Y chromosome, whereas males
have a pair of X-chromosomes besides autosomes.
d. Grasshopper is an example of XX type of sex determination in which the males
have only one X-chromosome besides the autosomes, whereas females have a
pair of X-chromosomes

Correct Option: a
Solution - Grasshopper is an example of XO type of sex determination in which the males have
only one X-chromosome besides the autosomes, whereas females have a pair of X-
chromosomes. Haplodiploid sex-determination system has special characteristic features such
as the males produce sperms by mitosis , they do not have father and thus cannot have sons, but
have a grandfather and can have grandsons. I Drosophila the males have one X and one Y
chromosome, whereas female have a pair of X-chromosomes besides autosomes
(https://www.pmfias.com/sex-determination-genetic-disorders-mendelian-disorders-chromosomal-
disorders/)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Cell Cycle & Cell Division
Sub concept: M Phase
Concept field: Prophase
47. Electron micrographs of ------------- indicate that chromosome synapsis is accompanied by the
formation of complex structure called synaptonemal complex.
a. Leptotene
b. Zygotene,
c. Pachytene
d. Diplotene

Correct Option: b
Solution - During zygotene chromosomes start pairing together and this process of association is
called synapsis. Such paired chromosomes are called homologous chromosomes. Electron
micrographs of this stage indicate that chromosome synapsis is accompanied by the formation of
complex structure called synaptonemal complex.
(https://www.studyrankersonline.com/19385/write-brief-note-on-following-synaptonemal-complex)
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve:45 sec
Concept: Biomolecules
Sub concept: Proteins and Amino acids
Concept field: Concept
48. The bond between the phosphate and hydroxyl group of sugar is an ---------- bond
a. Ester
b. Phosphodiester
c. Glycosidic
d. Peptide

Correct Option: a
Solution - In a polypeptide or a protein, amino acids are linked by a peptide bond which is
formed when the carboxyl (-COOH) group of one amino acid reacts with the amino (-NH2)
group of the next amino acid with the elimination of a water moiety (the process is called
dehydration).In a polysaccharide the individual monosaccharides are linked by a glycosidic
bond. This bond is also formed by dehydration. The bond between the phosphate and hydroxyl
group of sugar is an ester bond. As there is one such ester bond on either side, it is called
phosphodiester bond
(https://www.toppr.com/ask/question/choose-the-correct-answer-from-the-alternatives-given-in-a-
dna-molecule-the-phosphate-group/)

Question Type: NEET

Difficulty of question: Medium
Expected time to solve:45 sec
Concept: Biomolecules
Sub concept: Enzymes
Concept field: Chemical Reactions
49. With reference to Concept of activation energy , If ‘P’ is at a lower level than ‘S’, the reaction is
an -------------- reaction.
a. Transient
b. Spontaneous
c. Exothermic
d. Endothermic

Correct Option: c
Solution - If ‘P’ is at a lower level than ‘S’, the reaction is an exothermic reaction. One need not
supply energy (by heating) in order to form the product. However, whether it is an exothermic or
spontaneous reaction or an endothermic or energy requiring reaction, the ‘S’ has to go through a
much higher energy state or transition state. The difference in average energy content of ‘S’ from
that of this transition state is called ‘activation energy’.
(https://edurev.in/studytube/Enzymes/e45ab60e-5bc7-493b-841b-403d3dd6e695_t)
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Biomolecules
Sub concept: Lipids
Concept field: Concept
50. Trihydroxy propane is ---------
a. Simple Lipid
b. Fatty acids
c. Phosphorylated organic compound
d. Triglycerides

Correct Option: a
Solution - Fatty acids could be saturated (without double bond) or unsaturated (with one or more
C=C double bonds). Another simple lipid is glycerol which is trihydroxy propane. Many
lipids have both glycerol and fatty acids. Here the fatty acids are found esterified with glycerol.
They can be then monoglycerides, diglycerides and triglycerides. Some lipids have phosphorous
and a phosphorylated organic compound in them. These are phospholipids. They are found in
cell membrane.
(https://www.coursehero.com/file/p4jrpu8/Another-simple-lipid-is-glycerol-which-is-trihydroxy-
propane-Many-lipids-have/)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Human Reproduction
Sub concept: Menstrual Cycle
Concept field: Hormonal Control
51. During the fertile period ,the chances of fertilisation are very high from --------------days of the
the menstrual cycle
a. 10-14
b. 14-19
c. 10-17
d. 1-5

Correct Option: c
Solution - Periodic abstinence is a method in which the couples avoid or abstain from coitus
from day 10 to 17 of the menstrual cycle when ovulation could be expected. As chances of
fertilisation are very high during this period, it is called the fertile period. Therefore, by
abstaining from coitus during this period, conception could be prevented.
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Reproductive Health
Sub concept: Population Explosion and Birth Control
Concept field: Temporary Methods
52. What is true about progestogen–estrogen combination pills
a. It inhibits ovulation
b. It inhibits implantation
c. It alters the quality of uterine mucus to retard entry of sperms.
d. Both a and b

Correct Option: d
Solution - Pills have to be taken daily for a period of 21 days starting preferably within the first
five days of menstrual cycle. After a gap of 7 days (during which menstruation occurs) it has to
be repeated in the same pattern till the female desires to prevent conception. They inhibit
ovulation and implantation as well as alter the quality of cervical mucus to prevent/retard entry
of sperms
(https://www.toppr.com/ask/question/contraceptive-oral-pills-help-in-birth-control-by/)

Question Type: NEET

Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Reproductive Health
Sub concept: Infertility
Concept field: Gamete Intra Fallopian Transfer (GIFT)
53. Transfer of an ovum collected from a donor into the fallopian tube of another female who cannot
produce one, but can provide suitable environment for fertilization is termed -----------
a. Zygote intra fallopian transfer
b. intra-uterine insemination
c. Gamete intra fallopian transfer
d. Intra cytoplasmic sperm injection

Correct Option: c
Solution - Transfer of an ovum collected from a donor into the fallopian tube
(GIFT – gamete intra fallopian transfer) of another female who cannot produce one, but can
provide suitable environment for fertilisation and further development. Intra cytoplasmic sperm
injection (ICSI) is another specialised procedure to form an embryo in the laboratory in which a
sperm is directly injected into the ovum. The zygote or early embryos (with upto 8 blastomeres)
could then be transferred into the fallopian tube (ZIFT–zygote intra fallopian transfer) and
embryos with more than 8 blastomeres, into the uterus (IUT – intra uterine transfer), to complete
its further development.
(https://www.toppr.com/ask/question/the-technique-called-gamete-intra-fallopian-transfer-gift-is-
recommended-for-those-females/)
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Reproductive Health
Sub concept: Medical Termination of Pregnancy
Concept field: Concept
54. As per The Medical Termination of Pregnancy (Amendment) Act, 2017 , If the pregnancy has
lasted more than 12 weeks, but fewer than 24 weeks, ----------- registered medical practitioners
must be of the opinion, formed in good faith, that the required ground exist for termination of
pregnancy.
a. 4
b. 3
c. 2
d. 5

Correct Option: c
Solution - According to this Act, a pregnancy may be terminated on certain considered grounds
within the first 12 weeks of pregnancy on the opinion of one registered medical practitioner. If
the pregnancy has lasted more than 12 weeks, but fewer than 24 weeks, two registered medical
practitioners must be of the opinion, formed in good faith, that the required ground exist.
(https://doubtnut.com/ncert-class-12-biology-chapter-4-reproductive-health)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Cell - Unit of Life
Sub concept: Eukaryotic Cells
Concept field: Endomembrane System - Golgi Apparatus
55. --------------- is the important site of formation of glycoproteins and glycolipids.
a. Endoplasmic reticulum
b. Golgi complex,
c. Lysosomes
d. Vacuoles .

Correct Option: b
Solution - Golgi apparatus is the important site of formation of glycoproteins and glycolipids.
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Molecular Basis of Inheritance
Sub concept: DNA
Concept field: Structure Of Polynucleotide Chain
56. A single human cell has approximately ------------ long thread of DNA distributed among its
forty six (twenty three pairs) chromosomes.
a. 4 cm
b. 2 cm
c. 2 m
d. 4 m

Correct Option: c
Solution – A single human cell has approximately two metre long thread of DNA distributed
among its forty six (twenty three pairs) chromosomes.

Question Type: NEET

Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Human Reproduction
Sub concept: Parturition and Lactation
Concept field: Concept
57. Several mammary ducts join to form a wider mammary ampulla which is connected to
------------------- through which milk is sucked out.
a. lactiferous duct
b. lumens of alveoli
c. mammary tubules
d. alveolus

Correct Option: a
Explanation - The glandular tissue of each breast is divided into 15-20 mammary lobes
containing clusters of cells called alveoli .The cells of alveoli secrete milk, which is stored
in the cavities (lumens) of alveoli. The alveoli open into mammary tubules. The tubules of each
lobe join to form a mammary duct. Several mammary ducts join to form a wider mammary
ampulla which is connected to lactiferous duct through which milk is sucked out.
(https://www.studyadda.com/ncert-solution/12th-biology-human-reproduction/432/35395)
 Question Type: NEET
Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Human Reproduction
Sub concept: Gametogenesis
Concept field: Spermatogenesis
58. The ---------------- are transformed into spermatozoa (sperms) by the process called
spermiogenesis
a. Primary Spermatocytes
b. Secondary Spermatocytes
c. Spermatids
d. Male germ cells

Correct Option: c
Solution - The spermatogonia (sing. spermatogonium) present on the inside wall of seminiferous
tubules multiply by mitotic division and increase in numbers. Each spermatogonium is diploid
and contains 46 chromosomes. Some of the spermatogonia called primary spermatocytes
periodically undergo meiosis. A primary spermatocyte completes the first meiotic division
(reduction division) leading to formation of two equal, haploid cells called secondary
spermatocytes, which have only 23 chromosomes each. The secondary spermatocytes undergo
the second meiotic division to produce four equal, haploid spermatids
The spermatids are transformed into spermatozoa (sperms) by the process called spermiogenesis.
(https://www.toppr.com/ask/question/50-primary-spermatocytes-give-rise-to/)
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Reproduction in Organisms
Sub concept: Sexual Reproduction
Concept field: Post-Fertilisation Events - Zygote
59. Select the correct statement
a. The blastomeres in the blastocyst are arranged into an inner layer called
trophoblast and an outer group of cells attached to trophoblast called the inner
cell mass.
b. During fertilisation, a sperm comes in contact with the Corona radiata layer of
the ovum and induces changes in the membrane that block the entry of
additional sperms.
c. The meiotic division starts as the zygote moves through the isthmus of the
oviduct called cleavage towards the uterus and forms 2, 4, 8, 16 daughter cells
called blastomeres.
d. The chorionic villi and uterine tissue become interdigitated with each other and
jointly form a structural and functional unit between developing embryo
(foetus) and maternal body called placenta

Correct Option: d
Solution - The blastomeres in the blastocyst are arranged into an outer layer called trophoblast
and an inner group of cells attached to trophoblast called the inner cell mass. The mitotic
division starts as the zygote moves through the isthmus of the oviduct called cleavage towards
the uterus During fertilisation, a sperm comes in contact with the zona pellucida layer of the
ovum
(https://www.toppr.com/ask/question/which-one-is-initiated-by-secretion-of-trophoblast/)
 Question Type: NEET
Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Chemical Coordination and Integration
Sub concept: Human Endocrine System
Concept field: Pituitary Gland
60. Oxytocin acts on the uterine muscle and causes stronger uterine contractions, which in turn
stimulates further secretion of -----------------
a. FSH
b. LH
c. GnRH
d. Oxytocin

Correct Option: d.
Solution- The signals for parturition originate from the fully developed foetus and the placenta
which induce mild uterine contractions called foetal ejection reflex. This triggers release of
oxytocin from the maternal pituitary. Oxytocin acts on the uterine muscle and causes stronger
uterine contractions, which in turn stimulates further secretion of oxytocin. The stimulatory
reflex between the uterine contraction and oxytocin secretion continues resulting in stronger and
stronger contractions.
(https://www.toppr.com/ask/question/which-hormone-will-be-responsible-to-release-first-milk-from-
this-gland/)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Cell - Unit of Life
Sub concept: Prokaryotic Cells
Concept field: Cell Envelope and Its Modifications
61. A specialized differentiated form of cell membrane called -------------is the characteristic of
prokaryotes.
a. plasmid
b. circular DNA
c. ribosomes
d. mesosome

Correct Option: d
Solution - Prokaryotes have something unique in the form of inclusions. A specialised
differentiated form of cell membrane called mesosome is the characteristic of prokaryotes. They
are essentially infoldings of cell membrane.
(https://www.quora.com/What-is-meant-by-prokaryotes-have-something-unique-in-the-form-of-
inclusions)

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Cell - Unit of Life
Sub concept: Eukaryotic Cells
Concept field: Cell Membrane
62. With reference to Cell membrane , the lipids are arranged within the membrane with the polar
head towards the -------- sides and the -------- tails towards the inner part
a. Outer , Hydrophobic
b. Outer , Hydrophilic
c. Inner , Hydrophobic
d. Inner , Hydrophilic

Correct Option: a
Solution - The major lipids are phospholipids that are arranged in a bilayer. Also, the lipids are
arranged within the membrane with the polar head towards the outer sides and the hydrophobic
tails towards the inner part. This ensures that the nonpolar tail of saturated hydrocarbons is
protected from the aqueous environment

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Structural Org. in Animals
Sub concept: Animal Tissues
Concept field: Connective Tissue - Connective Tissue Proper
63. --------------facilitate the cells to communicate with each other by connecting the cytoplasm of
adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules.
a. Tight junctions
b. Gap junctions
c. Adhering junctions
d. Plasmodesmata

Correct Option: b
Solution - Three types of cell junctions are found in the epithelium and other tissues. These are
called as tight, adhering and gap junctions. Tight junctions help to stop substances from leaking
across a tissue. Adhering junctions perform cementing to keep neighboring cells together. Gap
junctions facilitate the cells to communicate with each other by connecting the cytoplasm of
adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules.
(https://www.toppr.com/ask/question/cell-junctions-are-present-in-the-epithelium-and-other-tissues/)

Question Type: NEET

 Difficulty of question: Medium
Expected time to solve:45 sec
Concept: Structural Org. in Animals
Sub concept: Cockroach
Concept field: Anatomy
64. In female Cockroach , the 7th sternum is boat shaped and together with the 8th and 9th sterna
forms a brood or genital pouch whose ----------- part contains female gonopore, spermathecal
pores and collateral glands.
a. Posterior
b. Median
c. Lateral
d. Anterior

Correct Option: d
Solution - The abdomen in both males and females consists of 10 segments. In females, the 7th
sternum is boat shaped and together with the 8th and 9th sterna forms a brood or genital pouch
whose anterior part contains female gonopore, spermathecal pores and collateral glands.
(https://brainly.in/question/2078938)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Structural Org. in Animals
Sub concept: Cockroach
Concept field: Anatomy
65. In male Cockroach ,the characteristic mushroom shaped gland is present in the -----------
abdominal segments which functions as an accessory reproductive gland.
a. 4th – 6th
b. 2nd – 6th
c. 6th – 7th
d. 9th – 10th

Correct Option: c
Solution - characteristic mushroom shaped gland is present in the 6th-7th abdominal segments
which functions as an accessory reproductive gland.

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Anatomy - Flowering Plants
Sub concept: The Tissues
Concept field: Xylem Or Hadrome
66. In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre. Such
arrangement of primary xylem is called ----------
a. Radial
b. Bicollateral
c. Exarch
d. Endarch

Correct Option: c
Solution – In stems, the protoxylem lies towards the centre (pith) and the metaxylem lies towards
the periphery of the organ. This type of primary xylem is called endarch. In roots, the
protoxylem lies towards periphery and metaxylem lies towards the centre. Such arrangement of
primary xylem is called exarch.
(https://cracku.in/35-in-roots-the-protoxylem-lies-towards-periphery-and-x-ssc-cgl-19-aug-shift-2)

Question Type: NEET

Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Transport in Plants
Sub concept: Transpiration
Concept field: Antitranspirants
67. The------------- help in preventing water loss due to transpiration.
a. Cuticle
b. Trichomes
c. Root hairs
d. Both a and b

Correct Option: d
Solution - The outside of the epidermis is often covered with a waxy thick layer called the cuticle
which prevents the loss of water. Cuticle is absent in roots On the stem the epidermal hairs are
called trichomes. The trichomes in the shoot system are usually multicellular. They may be
branched or unbranched and soft or stiff. They may even be secretory. The trichomes help in
preventing water loss due to transpiration.
(https://doubtnut.com/question-answer-biology/assertion-the-trichomes-in-the-shoot-system-are-
usually-multicelluler-reason-the-trichomes-help-in-p-13843615)

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Anatomy - Flowering Plants
Sub concept: The Tissues
Concept field: Meristematic Tissues
68. Phellogen cuts off cells on both sides., the outer cells differentiate into-------- while the inner
cells differentiate into ----------
a. Phellogen , Phellem
b. Phellem , Periderm
c. Phellem , Phelloderm
d. Phellogen , Phelloderm

Correct Option: c
Solution:- Phellogen cuts off cells on both sides. The outer cells differentiate into cork or
phellem while the inner cells differentiate into secondary cortex or phelloderm.
(https://www.studyadda.com/ncert-solution/11th-biology-anatomy-of-flowering-plants/397/28966)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Morphology - Flowering Plants
Sub concept: Root
Concept field: Regions of The Root
69. The main functions of root system are
a. Providing a proper anchorage to the plant parts,
b. Storing reserve food material
c. Synthesis of plant growth regulators.
d. All of the above

Correct Option: d
Solution - The main functions of the root system are absorption of water and minerals from the
soil, providing a proper anchorage to the plant parts, storing reserve food material and synthesis
of plant growth regulators.
(https://brainly.in/question/5292620)

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Morphology - Flowering Plants
Sub concept: Leaf
Concept field: Modifications of Leaves
70. Long thin flexible -------------- allow ------------to flutter in wind, thereby cooling the leaf and
bringing fresh air to leaf surface
a. Pulvinus , lamina
b. Petiole , Stipules
c. Petiole , Leafblade
d. Midrib , pulvinus

Correct Option: c
Solution - In some leguminous plants the leafbase may become swollen, which is called the
pulvinus. The petiole help hold the blade to light. Long thin flexible petioles allow leaf blades to
flutter in wind, thereby cooling the leaf and bringing fresh air to leaf surface. The lamina or the
leaf blade is the green expanded part of the leaf with veins and veinlets.

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Morphology - Flowering Plants
Sub concept: Flower
Concept field: Calyx
71. The floral symmetry in of Chilli is --------------
a. Actinomorphic
b. Zygomorphic
c. Asyymetric
d. Bilateral

Correct Option: a
Solution - When a flower can be divided into two equal radial halves in any radial plane passing
through the centre, it is said to be actinomorphic, e.g., mustard, datura, chilli.

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Morphology - Flowering Plants
Sub concept: Flower
Concept field: Calyx
72. The position of the mother axis with respect to the flower is represented by a ---------- on the top
of the floral diagram.
a. Dash
b. Asterisk
c. Dot
d. Hash

Correct Option: c
Solution - The position of the mother axis with respect to the flower is represented by a dot on
the top of the floral diagram.

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Reproduction in Plants
Sub concept: Post-Fertilisation: Structures and Events
Concept field: Seed
73. -------------------- is a scar on the seed coat through which the developing seeds were attached to
the fruit.
a. Testa
b. Tegmen
c. Hilum
d. Micropyle

Correct Option: c
Solution – Hilum is a scar on the seed coat through which the developing seeds were attached to
the fruit.

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Reproduction in Plants
Sub concept: Stamen, Microsporangium and Pollen Grain
Concept field: Microsporogenesis - Structure of Microspore
74. When the anther is young , a group of compactly arranged homogenous cells called -------------
occupies the centre of each microsporangium.
a. Middle layers
b. Tapetum
c. Sporogenous tissue
d. Connective

Correct Option: c
Solution - When the anther is young , a group of compactly arranged homogenous cells called
Sporogenous tissues occupies the centre of each microsporangium

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Morphology - Flowering Plants
Sub concept: Flower
Concept field: Gynoecium
75. A Multicellular , apocarpous Gynoecium is found in ------------
a. Michelia
b. Hibiscus
c. Papaver
d. All of the above

Correct Option: a
Solution - Michelia has apocarpous Gynoecium

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Reproduction in Plants
Sub concept: Pollination
Concept field: Self Pollination
76. Cleistogamous flowers are invariably autogamous as there is no chance of cross pollen falling on
the stigma.
a. Cleistogamous ,Geiotonogamous
b. Chasmogamous , Autogamous
c. Cleistogamous , Autogamous
d. Chasmogamous , Xenogamous

Correct Option: c
Solution - Cleistogamous flowers are invariably autogamous as there is no chance of cross pollen
falling on the stigma

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Reproduction in Plants
Sub concept: Pollination
Concept field: Self Pollination
77. If both male and female flowers are present on the same plant eg Castor , it prevents --------- but
not --------------.
a. Autogamy ,allogamy
b. Allogamy , autogamy
c. Geitonogamy , allogamy
d. Autogamy , geitonogamy

Correct Option: d
Solution: in Castor , Maize male and female flowers are present on the same plant eg Castor , it
prevents autogamy but not geitonogamy

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Reproduction in Plants
Sub concept: Post-Fertilisation: Structures and Events
Concept field: Endosperm
78. The coconut water from tender coconut is Free nuclear endosperm and the surrounding white
kernel is the cellular endosperm
a. Free nuclear , Helobial
b. Helobial , freenuclear
c. Cellular , free nuclear
d. Free nuclear , cellular

Correct Option: d
Solution - The coconut water from tender coconut is free nuclear endosperm and the surrounding
white kernel is the cellular endosperm.

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Reproduction in Plants
Sub concept: Post-Fertilisation: Structures and Events
Concept field: Endosperm
79. If the leaf has 2n = 18 , then find out the number of chromosomes in Endosperm , egg cell and
polar nuclei.
a. 18, 36,9
b. 27,18,9
c. 27, 9,18
d. 9,18,27

Correct Option: c
Solution – Endosperm = 3n =27
Egg = n = 9
Polar cell = 2n = 18

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Body Fluids & Circulation
Sub concept: Blood
Concept field: Blood Groups - Abo Grouping
80. Mother has blood group “A” and father with blood group – B.Blood group of their children
would be ?
a. Only B
b. Only A
c. Only O
d. A/B/AB/O

Correct Option: d
Solution – For blood group A – possibilities are AA & AO
For blood group B – possibilities are BB & BO
For cross between AO and BO , all 4 blood groups are possible .

Question Type: NEET

Difficulty of question: Medium
Expected time to solve: 45 sec
Concept: Plant Kingdom
Sub concept: Pteridophytes
Concept field: Pteropsida
81. Adiantum belongs to Class --------------
a. Lycopsida
b. Sphenopsida
c. Psilopsida
d. Pteropsida

Correct Option: d
Solution - The Pteridophytes are classified into four classes: Psilopsida (Psilotum); Lycopsida
(Selaginella, Lycopodium), Sphenopsida (Equisetum) and Pteropsida (Dryopteris, Pteris,
Adiantum).

Question Type: NEET

 Difficulty of question: Hard
Expected time to solve: 60 sec
Concept: Plant Kingdom
Sub concept: Pteridophytes
Concept field: Concept
82. The diploid sporophyte is represented by a dominant, independent,photosynthetic, vascular plant
body. It alternates with multicellular, saprophytic/autotrophic, independent but short-lived
haploid gametophyte. Such a pattern is seen in ------------
a. Bryophytes
b. Pteridophytes
c. Fucus
d. Chlamydomonas

Correct Option: b
Solution - The diploid sporophyte is represented by a dominant, independent,
photosynthetic, vascular plant body. It alternates with multicellular, saprophytic/autotrophic,
independent but short-lived haploid gametophyte. Such a pattern is known as haplo-diplontic life
cycle. All pteridophytes exhibit this pattern.
(https://www.toppr.com/ask/question/in-a-dominant-and-independent-diploid-sporophyte-alternates-
with-a-shortlived-independent-haploid-gametophyte/)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Plant Kingdom
Sub concept: Algae
Concept field: Rhodophyceae
83. ----------------- is very similar to amylopectin and glycogen in structure
a. Mannitol
b. Cholesterol
c. Floridean starch
d. Laminarin

Correct Option: c
Solution - The red thalli of most of the red algae are multicellular. Some of them have complex
body organisation. The food is stored as floridean starch which is very similar to amylopectin
and glycogen in structure.
(https://www.easytutorial.in/question/15204)

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Biological Classification
Sub concept: Kingdom Monera
Concept field: Concept
84. The three-domain system has also been proposed that divides the Kingdom ------------ into
------------ domains, leaving the remaining eukaryotic kingdoms in the third domain and thereby
a ---------kingdom classification..
a. Fungi , 6, 2
b. Monera 2,6
c. Monera 6,2
d. Fungi , 2,6

Correct Option: b
Solution - The three-domain system has also been proposed that divides the Kingdom Monera
into two domains, leaving the remaining eukaryotic kingdoms in the third domain and thereby a
six kingdom classification.

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Biological Classification
Sub concept: Kingdom Fungi
Concept field: Ascomycetes
85. ---------------- is used extensively in biochemical and genetic work.
a. Aspergillus
b. Neurospora
c. Claviceps
d. Morels

Correct Option: b
Solution: - Neurospora is used extensively in biochemical and genetic work. Many members like
morels and truffles are edible and are considered delicacies.

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Animal Kingdom
Sub concept: Classification of Animals
Concept field: Phylum – Annelida
86. Among Annelids , Nereis, is --------------, earthworms &leeches are --------------
a. Monoecious , Dioecious
b. Monoecius , Monoecious
c. Dioecious , Dioecious
d. Dioecious , Monoecious

Correct Option: d
Solution:- Nereis, an aquatic form, is dioecious, but earthworms and leeches are monoecious.

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Animal Kingdom
Sub concept: Classification of Animals
Concept field: Phylum – Chordata
87. --------------------migrate for spawning to fresh water. After spawning, within a few days, they
die. Their larvae, after metamorphosis, return to the ocean.
a. Lancelet
b. Carcharodon
c. Hagfish
d. Pristis

Correct Option: c
Solution - Cyclostomes are marine but migrate for spawning to fresh water. After spawning,
within a few days, they die. Their larvae, after metamorphosis, return to the ocean.
Examples: Petromyzon (Lamprey) and Myxine (Hagfish).

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Animal Kingdom
Sub concept: Classification of Animals
Concept field: Phylum – Mollusca
88. In the second largest Phylum , the space between the hump and the mantle is called the mantle
cavity in which feather like -------- are present.
a. Radulla
b. Statocysts
c. Stomochord
d. Gills

Correct Option: d
Solution - Body is covered by a calcareous shell and is unsegmented with a distinct head,
muscular foot and visceral hump. A soft and spongy layer of skin forms a mantle over the
visceral hump. The space between the hump and the mantle is called the mantle cavity in
which feather like gills are present. They have respiratory and excretory functions.
‘(https://www.toppr.com/ask/question/mollusca-is-differentiated-from-other-by-2/)

Question Type: NEET

Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Morphology - Flowering Plants
Sub concept: Description Of Some Important Families
Concept field: Solanaceae
89. Plant families like Convolvulaceae, Solanaceae are included in the order -----------------
a. Polymoniales
b. Poales
c. Sapindales
d. Anacardiaceae

Correct Option: a
Solution - Plant families like Convolvulaceae, Solanaceae are included in the order Polymoniales
mainly based on the floral characters.
(https://www.toppr.com/ask/question/plant-families-like-convolvulaceae-and-solanaceae-are-included-
in-the-order-polynomials-mainly-based-on/)

Question Type: NEET

 Difficulty of question: Easy
Expected time to solve: 30 sec
Concept: Neural Control & Co-ordination
Sub concept: Sensory Reception and Processing
Concept field: Eye -Parts of an Eye
90. The space between the lens and the retina is called the ---------------- and is filled with a
transparent gel called vitreous humor.
a. Vitreous chamber , Aqueous humor.
b. Aqueous chamber , Vitreous humor
c. Vitreous chamber , Vitreous humor
d. Aqueous chamber , Aqueous humor

Correct Option: c
Solution - The space between the cornea and the lens is called the aqueous chamber and contains
a thin watery fluid called aqueous humor. The space between the lens and the retina is called the
vitreous chamber and is filled with a transparent gel called vitreous humor.
(https://doubtnut.com/question-answer-biology/assertionthe-space-between-the-cornea-and-the-lens-
is-called-the-vitreous-chamber-reasonthe-space-be-14272706)