Rojal Arademy
Pre-Board Examination
Class X
Subject Biology
Session: 2022 - 2023
Time: 2 Hrs. Full Marks : 80
Section - A
[Attempt all questions from this section]
Question 1.
[15]
Select the correct answers to the questions from the given options. [Do not copy the questions. Write the
correct answer onlyl
A. A muscular wall is absent in:
i) Capillary ii) Venule ii) Arteriole iv) Vein
B. Generally on which day ofthe menstrual cycle does ovulation take place?
i) 1st day ii) 5th day ii) 14h day iv) 28 day
C. The number of chromosomes in a human skin cell are:
i) 22 ii) 23 ii) 44 iv) 46
D. Cretinism and Myxedema are due to -
i) Hypersecretion of thyroxine ii) Hypersecretion of G.H.
ii) HYpersecretion of thyroxine iv) Hyposecretion of G.H.
E. Birth rate is the number of live births
i) Per 100 people per year ii) Per 100 people per decade
iii) Per 1000 people per year iv) Per 1000 people per decade
F. Burning of waste substances usually at high temperature is -
i) Land filling i) Incineration ii) Composting iv) Segregation
G. The information source for making proteins in the cell is -
i) Chromosome i) DNA iii) Enzyme iv) Nucleus
H. Which one of the following has cytoplasm but not nucleus?
i) Xylem vessel i) Sieve tube ii) Tracheid iv) Companion cell
I. Organ of Corti is present in
i) Utriculus ii) Sacculus ii) incus iv) Cochlea
After mitotic cell division, a female human cell will have -
J.
1) 22 +X chromosomes ii)22+Y chromosomes
iii) 44+ XY chromosomes iv) 44+ XX chromosomes
K. Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher
trophic level is known as -
i) Pollutions i)Eutrophication ii) Biomagnification iv) Accumulation
L. A person is unable to swallow after a head injury. Which part of his brain is responsible for this?
i) Cerebral hemisphere ii) Diencephalon ii) Midbrain iv) Hind brain
Delhi in 2010?
in Mayapuri,
M. Which radioactive waste is responsible for causing severe damage iv) lodine 141
ii) Cobalt 50 ii) Cobalt 60
i) lodine 131
N. A highly thick muscular chamber of the heart is- ii) Right ventricle
iv) Left auricle
i) Right atrium ii) Left ventricle
If a marries a normal homologous woman, what is the probability that their daughter
. haemophilic man
will be haemophilic? iv) 100%
i) 20% ii) 50% ii) 0%
Question 2.
A. Name the following: 5
a) The suppressed allele of a gene.
b) The centre of reflex action.
c) A neurotransmitter
d) Part of ovary that produces progesterone
e) The process of RBCs formation.
B. Choose the odd one out from the following terms and name the category to which the other belong - [5]
a) Sneezing, Coughing, Typing, Blinking
b) Fundus, Cervix, Vagina, Testes
c) Smog. Dizziness, Allergies, Coughing
d) GH, ADH, TSH, FSH
e) Cornea, Choroid, Iris, Pupil
C. Match the items in Column I with the most appropriate ones in Column II and rewrite the correct
matching pairs
Column Column II
a) Junction between 2 neurons i) Ears
b) Luteal phase ii) Synapse
c) Auditory nerve ii) Cranial meanings
d) Protective covering of brain iv) Progesterone
e) Occipital lobe v) Visual perception
vi) Testosterone
vii) Neurotransmitter
D. Arange and rewrite the terms in each group in the correct order so as to be in a logical sequence
beginning with the term that is-underlined -
a) Cortex, Xylem, Soil water, Root hair
b) Pulmonary vein, Left ventricle, Aorta, Left auricle
c) Lens, Retina, Aqueous humour, Optic nerve
d) Receptor, Motor neuron, Spinal nerve, Sensory nerve, Effector
e) Spongy cells, Upper epidermis, Stroma, Palisade tissue, Substomatal space
E. State the exact location of the following structures
a) Blind spot b) Oval window c) Prostate gland d) Stirrup e) Nissl's granules
Section B
Attempt any FOUR questions from this section]
[1+2+2+2+3]
Question3.
a) Define passive transport.
b) What is chemotropism? Give one example.
c) What is the significance of Rh factor in pregnancy?
d) What is parthenocarpy? Give one example. the
shown in the figure 'A'. After about one month,
e) Acomplete ring of bark was removed from a tree a
'B'. Study the figures and answer the questions that follows:
bark of the tree appeared as
i) What is the aim of the above experiment?
ii) Why does the bark below the ring shrink?
vascular bundle.
iii) State the location of Xylem and phloem in
Question 4. [1+2+2+2+3]
a) Define ditresis.
b) It is better to transplant seedlings in a flower bed in the evening
-
and not in the morning. Why?
c) Differentiate between pure bread and hybreed.
d) The gender of a child depends on father. Explain.
of an artery and a vein.
e) Draw neat labeled diagrams showing the cross-section
Question 5. [1+2+2+2+3]
a) Define gene.
What is the significance of hepatic portal vein?
b)
Give two reasons for a sharp rise in world human population.
c)
Give suitable behind it.
d) Some women have facial hair like beard and moustache.
reason
that follows:
e) Study the given diagram and answer the questions
i) Identify the structure Labelled as A.
ii) How does part 'F" differs from part 'D°?
il) Among A. B and C where does seminiferous tubules are located?
Question 6. [1+2+2+2+3]
a) Define systemic circulation.
b) Write the composition of urine.
c) Make a Punnett Square for finding out proportional of different genotypes in the progeny of a genetic
cross between pure tall (TT) pea plant with a pure dwarf (tt) pea plant.
d) Rate of photosynthesis is low at very high temperature. Why?
e) Study the diagram given below and answer the questions that follows
A-
i) Name the parts labeled A. B and C in the figure.
ii) What is the function of CSF?
ii) Name the different layers of meaninges.
Question 7. [1+2+2+2+3]
a) Define the term greenhouse effect.
b) Why resources cannot keep pace with the rising population?
c) The mature erythrocytes in humans lack nucleus and mitochondria. Give reason.
d) What are the differencesbetween diabetes insipidus and mellitus?
e) Draw a well labeled diagram of the inner ear.
Question 8. [1+2+2+2+3]
a) Name the part of inner ear which converts the pressure variations into electrical signals.
b) When the ovum get fertilized, the menstrual cycle stops temporarily in a woman. Give suitable
explanation.
c)State two functions of spleen.
d) State two functions of ABA.
e) Observe the image and answer the following questions-
i) Identify the type of pollution shown in the above image.
ii) How this type of pollution is harmful to humans?
ii) What are the underlying causes of this pollution?
