प्रतिभास्थली ज्ञानोदय तिद्यापीठ

िातषिक परीक्षा
तिषय – जीि तिज्ञान
कक्षा: 11 तदनाांक: 02/1/2024
पर्
ू ाांक: 70 समय: 3 घटां े
General Instructions:
i. This question paper consists of 33 questions in 5 sections.
ii. All questions are compulsory. However, an internal choice is provided in some questions. A student is
expected to attempt only one of these questions.
iii. Section A consists of 16 Objective type questions carrying 1 mark each.
iv. Section B consists of 5 Very Short questions carrying 02 marks each. Answers to these questions should
be in the range of 30 to 50 words.
v. Section C consists of 7 Short Answer type questions carrying 03 marks each. Answers to these questions
should be in the range of 50 to 80 words.
vi. Section D consists of 3 Long Answer type questions carrying 5 marks each with subparts
vii. Section E consists of 2 Cased based questions carrying 4 marks each
Section -A
1. What is the correct sequence? 1
(a)Genus-species-order-kingdom (b)Species-order-phylum-kingdom
(c)Species-genus-order-phylum (d)Kingdom-phylum-class-order
2. Vascular plants, with seeds but no fruits are 1
(a) Bryophyte (b) Angiosperms (c) Gymnosperms (d) Pteridophytes
3. The animal possessing the following type of germ layers (a and b) 1
are called __________ and ___________ respectively
(a) Diploblastic, Triploblastic
(b) Triploblastic, Diploblastic
(c) Diploblastic, Diploblastic
(d) Triploblastic, Triploblastic

4. Which of the following options correctly identifies 1

the structural formula shown in the figure?
(a) A- Fructose, B- Ribose
(b) A- Glucose, B- Deoxyribose
(c) A- Glucose, B- Ribose
(d) A- Glucose, B- Fructose

5. The flower is 1
(a) reproductive unit in gymnosperms (b) reproductive unit in angiosperm
(c) modified shoot apical meristem (d) Both 2 and 3
6. In the given diagram , which structures are part of stomatal apparatus? 1
(a) A, B, C and D
(b) B, C, D and E
(c) B, C and D
(d) A, B, C and D

1
7. Match the list I with List II 1
List-I List-II
(a) Mast cell (i) store fat
(b) Macrophage (ii) Show allergy response
(c) Eosinophil (iii) Phagocytosis
(d) Adipocyte (iv) Secrete heparin
Choose the correct answer from the options given below:
(a) (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
(b) (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
(c) (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
(d) (a)-(iii), (b)-(i), (c)-(iv), (d)-(i)
8. ATP is formed during which step of glycolysis 1
(a) Glucose→Glucose-6-phosphate (b) Fructose-6-phosphate →Fructose1, 6-bisphosphate
(c) Phosphoenolpyruvate → Pyruvic acid (d) Phosphoglycerate → phosphoenolpyruvate
9. Which of the following is incorrect? 1
(a) Smallest cell → Mycoplasma
(b) Smallest cell → Bacteria
(c) Largest single cell → Ostrich’s egg
(d) All of these
10. Blood carries the CO2 in three forms. The 1
correct percentages of CO2 in these forms are-
(a) -- (1)
(b) – (2)
(c) - (3)
(d) – (4)

11. In given figure, identify A to C 1

(a) A-Actin binding sites, B-Head, C-ATP binding sites
(b) A-Head, B-Actin binding sites, C-ATP binding sites
(c) A-ATP binding sites, B-Actin binding sites, C-Head
(d) A-ATP binding sites, B-Head, C-Actin binding sites
12. Statement-I : Daughter cells are exactly similar in all respect in case of mitosis 1
Statement-II : Daughter cells have half the number of chromosomes as compared to mother cell in mitosis.
(a) Both statement I and II are correct
(b) Statement I is correct but statement II is incorrect
(c) Statement I is incorrect but statement II is correct
(d) Both statement I and II are incorrect
13. Read the following statements and choose correct option. 1
Statement-I: Root cap protects the apex of the root.
Statement-II: Meristematic zone cells are thick walled.
(a) Both statement I and II are correct
(b) Statement I is correct but statement II is incorrect
(c) Statement I is incorrect but statement II is correct
(d) Both statement I and II are incorrect.
14. Assertion : Plants retain the capacity for unlimited growth throughout their life. 1
Reason : This Ability of the plants is due to the presence of meristems at certain locations in their body.
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) and Reason (R) both are false.
15. Assertion (A): Euglena is a plant due to the presence of chlorophyll. 1
Reason (R): Euglena lacks cell wall as Dinoflagellates.
16. Assertion (A): Adrenal medulla is called the gland for 'fight, fright and flight'. 1
Reason (R): The hormones adrenaline and nor-adrenaline help the body to combat against stress and
emergency conditions.
2
 Section -B
17. Explain the defining characteristics of living organisms. 2

18. You have studied mitosis in onion root cells. It has 14 chromosomes in each cell. Can you tell how many 2
chromosomes will the cell have at G1 phase, after S phase and after M Phase? Also, what will be the DNA
content of the cell at G1after S and at G2, if the content after M phase is 2C?
19. (i)How are lipids arranged in the cell membrane? What is its significance? 2
(ii)The prokaryotic cells have certain specialised, differentiated infoldings of the cell membrane. They serve
certain specific functions. Mention them. (Any 2)
Or
Draw a well labelled diagram of cell organelle called as kitchen of plant cell.
20. Which plant growth regulator would you use if you are asked to: 2
(a) induce rooting in a twig (b) 'bolt' a rosette plant
(c) delay leaf senescence (d) induce immediate stomatal closure in leaves?
Or
If a primary root grows from 5 cm to 20cm in a week, find out its (a) absolute growth rate and (b) relative
growth rate, over this period (log4=0.602)
21. (i)A fluid-filled double membranous layer surrounds the lungs. Name it and mention its important function. 2
(ii) Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system.
Why?
Or
What is chloride shift? Write its significance during respiration.
Section -C
22. (i)Exchange of calcium between bone and extracellular fluid takes place under the influence of certain 3
hormones-
(a)What will happen if more of Ca+ is in extracellular fluid?
(b)What will happen if very less amount of Ca+ is in the extracellular fluid?
(ii)Differentiate between Pectoral and Pelvic girdle.
Or
With respect to rib cage, explain the following: (a) Bicephalic ribs (b)True ribs (c)Floating ribs
23. (i)List out difference between virus and viroids 3
(ii)What is the nature of the cell wall in diatoms
(iii)Name the groups of organisms included in the phylum Chrysophyta.
Or
(i)Name the eubacteria which are also referred to as blue-green algae.
(ii)What is heterocyst?
(iii)What is the thermoacidophiles?
24. Define isogamy , anisogamy and oogamy and give example of 3
for each from class algae
Or
Observe the diagram and answer the questions that follow:
(i) Identify the plant given above and name the division, it
belongs to.
(ii) Label the parts A, B, C and D marked on it.
(iii) Give a brief description of part C.
25. Name- 3
(a) A limbless animal
(b) A cold blooded animal
(c) A warm blooded animal
(d) An animal possessing dry and cornified skin
(e) An animal having canal system and spicules
(f) An animal with cnidoblasts
Or 3
 (i)How important is the presence of air bladder in Pisces?
(ii)What are the modifications that are observed in birds that help them fly?
(iii)What are the reasons that you can think of for the arthropods to constitute the largest group of the animal
kingdom?
26. (i)How many chambers are present in the heart of a frog? 3
(ii)Frogs show sexual dimorphism. Justify.
(iii)Explain the role of thin and moist skin of amphibians
Or
The picture given below is the diagrammatic representation of pituitary and its
relationship with the hypothalamus.
Answer the following questions.
(i) What does A represent? Name the two hormones secreted by A.
(ii) What is the significance of D?
Or
(ii) Location of pituitary gland.What it is also called?
(iii) Identify B. What is its harmones role in the endocrine system?

27. Shyam wants to grow some monocot crops in his field. But as he is a farmer he does not know much about 3
such crops and he might mix up monocots with dicot crops. Give some anatomical points of distinction
between the monocot and dicot stem for his knowledge
(a)Hypodermis (b) arrangement of vascular bundles (c) cambium
Or
(i)The endosperm is formed as a result of double fertilisation (triple fusion). What is its function?
(ii)In pea flowers, the aestivation in corolla is known as vexillary. Give a reason.
(iii)What do the following terms stands for in a floral formula? P,G,K(n),%
28. (i)Discuss briefly the role of nucleolus in the cells actively involved in protein synthesis. 3
(ii)Why does the Golgi apparatus in close association with the endoplasmic reticulum.
(iii)Cilia and flagella play and important role in cell functioning? How?
Or
(i)Illustrate a glycosidic peptide and peptide bond
(ii)Nucleic acids exhibit secondary structure. Justify with an example
Or
(ii)Both starch and cellulose are polymers of glucose but starch gives a blue black colour with iodine where is
no colour is obtained with cellulose. Why?

Section -D
29. (i)Write difference between Nucleoside and nucleotide with examples and structure. 5
(ii)Following is the given list of some amino acids. Observe them carefully.
Arginine, Glutamine, Histidine, Proline, Lysine, Isoleucine, Tryptophan. Which of the above amino acid(s)
is/are not synthesized by the body and why?
(iii)What is a triglyceride composed of?
(iv)What is meant by transition state structure of the substrate?
Or
(iv)What is a phosphodiester bond?
OR
(i) What are the two major phases in a cell cycle?
Which of them is (a) of longer duration and (b) actual phase of cell division?
(ii)(a)At which stage synaptonemal complex formed during zygotene dissolve and recombined homologous
chromosomes start separating from each other (b)crossing over takes place
(iii)Give two examples of cells in our body that are being constantly replaced.
(iv)Why do we say that the centromere of each chromosome is at the leading edge during anaphase?
(v)Which stage of cell division will you select to study the morphology of chromosomes and why?

4
30. (i)Which of the following are included in the photochemical phase or light reaction? 5
Oxygen absorption, light absorption, water absorption, ATP, NADPH, FADH and water splitting
(ii) Fill in the space, left blank in the given table to bring the difference between C3 and C4plants:

(iii)Give Reason –
(a)Photorespiration is considered as a wasteful process.
(b)Chloroplasts are generally located at the outer margins of mesophyll cells.
Or
Chloroplasts and mitochondria called as semi- autonomous cell organelle.
OR
(i) Why does a person with sufficient white fibres get fatigued in a short period?
(ii) Different substrates get oxidized during respiration. How does Respiratory Quotient (RQ) indicate which
type of substrate, i.e., carbohydrate, fat or protein is getting oxidized?
RQ= A/B
What do A and B stand for? What type of substrates has RQ of 1, < 1 or > 1?
(iii) Pyruvic acid is the end product of glycolysis. What are the two metabolic fates of pyruvic acid under
aerobic and anaerobic conditions respectively?
31. (i) (a)What is resting membrane potential? 5
(b)Give the role of sodium-potassium pumps in maintaining it.
(c)How does resting potential change into action potential?
(ii)Our reactions like aggressive behaviour, use of abusive words, restlessness, etc. are controlled by brain.
Name the specific parts of the brain involved.
(iii) Rearrange the following in the correct order of involvement in electrical impulse movement: Synaptic
knob, dendrites, cell body, axon terminal, axon.
Or
(i)Name the blood cell that is involved in the immune response and it is multilobed and bilobed
(ii)Name the following-
(a)The antigen present in the blood of O group
(b)The antibody present in the blood of AB group
(iii)How can the heart rate be calculated using ECG?
(iv)How is heart attack different from heart failure?
(v)How do atrium and ventricles differ in regard to-
(a)Presence of semi lunar valves (b)Type of blood
Section -E

32. For a survey on kidney failure, some students visited hospitals in their area. They met different people with 4
different kidney disorders. During this survey, they found that most of the kidney failure is due to improper
filtration and disturbed filtration mechanism. On the basis of this answer the related questions given below:

(i)What will happen to the glomerular filtration if the afferent renal arteriole is decreased in diameter and
efferent renal arteriole increases in diameter?
(a) Be faster (b) Be slower (c) Take place at the same speed (d) No effect will be seen
(ii)Which is reabsorbed in then following is completely reabsorbed renal tubules?
(a) Sodium (b) Water (c) Potassium (d) Glucose
(iii)State true or false giving reason.
(a) ADH aids in the removal of water by making the urine hypotonic.
(b) The Henle's loop is an important part of the urine concentration process
5
 (iv)Mark the odd ones as each of the following.
(a) renal cortex, Renal pelvis, medullary pyramid, ureter
(b) Afferent arteriole, Henle's loop, vasa recta, efferent arteriole.
(c) Glomerular filtration, hypertonic urine, collecting duct, antidiuretic hormone
(d) Proximal convoluted tubule, distal convoluted tubule, Henle's loop, renal corpuscle.
(v) The mechanism of concentration of filtrate is also known as counter current mechanism. Justify the
statement.
33. It refers to the final process while the organism is respiring in the presence of oxygen. It requires the transfer 4
of electrons to produce ATP. Different molecules produce different numbers of ATP while we proceed
through this process. The process takes place within the membrane of some important organelle of the cell.
Many complexes are involved in the transport of electrons, they pass via complex I to V. Small proteins are
attached to its outer membrane that acts as a mobile carrier for transfer of electrons from complex III to IV.
(i)Identify the above event.
(ii)Where does this event occur in the cell?
(iii)Give another name for this organelle and also give a reason why it is called so?
(iv)Identify the protein involved and name it. Where it is located?