Number of chromosomes present in

Q1
the meiocyte of house fly is

A. 12
B. 6
C. 24
D. 48
 DISCUSSION

Meiocytes: Specialised cells (also

called gamete mother cells) which
undergo meiosis
 DISCUSSION

The number of chromosomes

in the meiocyte of the housefly
is 12
 Number of chromosomes present in
Q1
the meiocyte of house fly is

A. 12
B. 6
C. 24
D. 48
 Read the following statement and choose the option that
Q2 correctly fills the blank.
Small amounts of urea could be eliminated through
________.
A. Lungs

B. Saliva

C. Bile

D. Liver
 DISCUSSION

Small amounts of urea could be

eliminated through saliva.
 DISCUSSION
● Urea produced via urea cycle in liver, is then
released into the bloodstream, where it travels to
the kidneys and is ultimately excreted in urine.
 Read the following statement and choose the option that
Q2 correctly fills the blank.
Small amounts of urea could be eliminated through
________.
A. Lungs

B. Saliva

C. Bile

D. Liver
 The first human hormone produced
Q3
by recombinant DNA technology is
A. Insulin
B. Melatonin
C. Testosterone
D. Progesterone
 DISCUSSION
In 1983, Eli Lilly an American company prepared two DNA sequences
corresponding to A and B, chains of human insulin and introduced them
in plasmids of E. coli to produce insulin chains.
 DISCUSSION
● Chains A and B were produced separately,
extracted and combined by creating disulfide bonds
to form human insulin (Humulin).

S S
A chain

S S Disulphide
S bonds
S
B chain
 The first human hormone produced
Q3
by recombinant DNA technology is
A. Insulin
B. Melatonin
C. Testosterone
D. Progesterone
Q4 The human embryo develops from

A. Only hypoblast cells

B. Inner cell mass
C. Allantois
D. Trophoblast
 DISCUSSION
After fertilization the zygote undergoes
repeated mitotic divisions called as
cleavage divisions.
 DISCUSSION
● Blastocyst is formed after rapid cleavage in the zygote.
● It contains 200-300 cells.
DISCUSSION
 DISCUSSION
● The inner cell mass differentiates into an
embryo and gives rise to three germinal
layers and subsequent foetal tissues.

Ectoderm
Endoderm
Mesoderm

Gastrula
Q4 The human embryo develops from

A. Only hypoblast cells

B. Inner cell mass
C. Allantois
D. Trophoblast
 Given below is the percentage of nitrogenous bases
Q5 present in four different samples of the genetic material.
Identify, which sample belongs to an RNA virus

A. Sample A : A-23%, G-27%, C-27%, T-23%

B. Sample B : G-22%, A-28%, C-22%, T-28%
C. Sample C : U-22%, G-23%, C-23%, A-32%
D. Sample D : C-8%, A-42%, G-8%, T-42%
 DISCUSSION
+ = +

Purines Pyrimidines

Chargaff’s Rule :
❖ In DNA, Adenine = Thymine; Cytosine = Guanine
❖ A+G=C+T
❖ Total number of purines = Total number of pyrimidines
 DISCUSSION

● Chargaff’s rule is not applicable to ssDNA or RNA.

● In sample C, the percentage of adenine and uracil
are not equal.
 Given below is the percentage of nitrogenous bases
Q5 present in four different samples of the genetic material.
Identify, which sample belongs to an RNA virus

A. Sample A : A-23%, G-27%, C-27%, T-23%

B. Sample B : G-22%, A-28%, C-22%, T-28%
C. Sample C : U-22%, G-23%, C-23%, A-32%
D. Sample D : C-8%, A-42%, G-8%, T-42%
Q6 Select the mismatch among the following

A. ZIFT – Transfer of zygote or early embryos

(with upto 8 blastomeres) into fallopian tube
B. GIFT – Gametes are transferred in uterus
C. IUT – Transfer of embryos with more than 8
blastomeres within uterus
D. Intracytoplasmic sperm injection - Sperm is
directly injected into the ovum
 DISCUSSION
● Gamete Intra Fallopian Transfer (GIFT): Transfer of ovum from donor into
the fallopian tube of another woman, who cannot produce egg, but provide
suitable environment for fertilisation and further development

Ovum
Ampulla
Q6 Select the mismatch among the following

A. ZIFT – Transfer of zygote or early embryos

(with upto 8 blastomeres) into fallopian tube
B. GIFT – Gametes are transferred in uterus
C. IUT – Transfer of embryos with more than 8
blastomeres within uterus
D. Intracytoplasmic sperm injection - Sperm is
directly injected into the ovum
 Read the following statements about echinoderms and
Q7 choose the option that correctly fill the blanks A and B.
A
Adult echinoderms show _______ symmetry, but their
larvae show ______
B symmetry.
A. (A) – Radial; (B) – Radial
B. (A) – Bilateral; (B) – Bilateral
C. (A) – Radial; (B) – Bilateral
D. (A) – Bilateral; (B) – Radial
 DISCUSSION
Symmetry

Radial Bilateral Asymmetry

 DISCUSSION

Adult echinoderms are

radially symmetrical but
their larvae are bilaterally
symmetrical.
 Read the following statements about echinoderms and
Q7 choose the option that correctly fill the blanks A and B.
A
Adult echinoderms show _______ symmetry, but their
larvae show ______
B symmetry.
A. (A) – Radial; (B) – Radial
B. (A) – Bilateral; (B) – Bilateral
C. (A) – Radial; (B) – Bilateral
D. (A) – Bilateral; (B) – Radial
 Which type of vector is used to introduce a
Q8 functional ADA cDNA into lymphocytes, in
gene therapy for ADA deficiency?
A. Plasmid
B. Bacteriophage
C. BAC
D. Retrovirus
 DISCUSSION
Somatic gene therapy

Extraction of Preparation of retroviral

lymphocytes vector containing ADA
from patient’s blood complementary DNA

Introduction of
modified lymphocytes
into the patient Modified lymphocytes multiply
 Which type of vector is used to introduce a
Q8 functional ADA cDNA into lymphocytes, in
gene therapy for ADA deficiency?
A. Plasmid
B. Bacteriophage
C. BAC
D. Retrovirus
Q9 Match column I with column II and choose the correct option.
A. a(i), b(iv), c(ii), d(iii)
Column I Column II B. a(iv), b(iii), c(ii), d(i)
a. Foetus develop i. End of second C. a(iii), b(iv), c(ii), d(i)
limbs and digits trimester
D. a(iv), b(i), c(ii), d(iii)
b. First movements of ii. End of first
foetus month

c. Heart formed iii. Fifth month

d. Eye-lids separate and iv. End of second

eyelashes are formed month
 DISCUSSION

Trimester: First
Month: End of first month
Important development: Heart
is formed
 DISCUSSION

Trimester: First
Month: End of second month
Important development:
Develop limbs and digits
 DISCUSSION

Trimester: Second
Month: Fifth month
Important development: First
movements of foetus
 DISCUSSION

Trimester: End of second trimester

Month: Sixth month
Important development: Eye-lids
separate and eyelashes are formed
Q9 Match column I with column II and choose the correct option.
A. a(i), b(iv), c(ii), d(iii)
Column I Column II B. a(iv), b(iii), c(ii), d(i)
a. Foetus develop i. End of second C. a(iii), b(iv), c(ii), d(i)
limbs and digits trimester
D. a(iv), b(i), c(ii), d(iii)
b. First movements of ii. End of first
foetus month

c. Heart formed iii. Fifth month

d. Eye-lids separate and iv. End of second

eyelashes are formed month
 Which of the following is an active ATPase
Q10
enzyme?

A. Light meromyosin
B. Globular head of meromyosin
C. Tropomyosin

D. Tail of meromyosin
 DISCUSSION
Actin-binding site
Heads
Myosin-ATPase site Heavy
Tail
meromyosin
Light meromyosin

● The globular head is an active ATPase

enzyme and has binding sites for ATP
and active sites for actin.
 Which of the following is an active ATPase
Q10
enzyme?

A. Light meromyosin
B. Globular head of meromyosin
C. Tropomyosin

D. Tail of meromyosin
 Which of the following animal evolved into first
Q11
amphibians that lived on both land and water?

A. Neopilina
B. Lobe-finned fishes
C. Archaeopteryx
D. Ichthyosaurs
 DISCUSSION
● Lobe finned fishes evolved into first amphibians
 DISCUSSION
● The proof that birds evolved from reptiles came
from fossil studies of Archeopteryx.

Archaeopteryx Archaeopteryx
fossil
 DISCUSSION

Neopilina
● The connecting link between
Annelida and Mollusca
 DISCUSSION
Ichthyosaurs
● Highly specialized aquatic reptiles

Ichthyosaurs fossil
 Which of the following animal evolved into first
Q11
amphibians that lived on both land and water?
A. Neopilina
B. Lobe-finned fishes
C. Archaeopteryx
D. Ichthyosaurs
 Choose the option that correctly fill the blanks (A) and (B).
Statement I : The intercellular material of
Q12 (A)
cartilage is _______ and resists compression.
Statement II : Bones have a ______
(B) ground substance rich in
calcium salts and collagen

A. (A) – Hard and non-pliable (B) – Solid and pliable

B. (A) – Solid and pliable (B) – Hard and non-pliable
C. (A) – Soft and non-pliable (B) – Solid and pliable
D. (A) – Solid and pliable (B) – Soft and non-pliable
 DISCUSSION
● The intercellular material of cartilage is
solid and pliable and resists compression.

Cartilage
 DISCUSSION
● Bones have a hard and non-pliable ground substance rich in
calcium salts and collagen fibres which give bone its strength.
 Choose the option that correctly fill the blanks (A) and (B).
Statement I : The intercellular material of
Q12 (A)
cartilage is _______ and resists compression.
Statement II : Bones have a ______
(B) ground substance rich in
calcium salts and collagen

A. (A) – Hard and non-pliable (B) – Solid and pliable

B. (A) – Solid and pliable (B) – Hard and non-pliable
C. (A) – Soft and non-pliable (B) – Solid and pliable
D. (A) – Solid and pliable (B) – Soft and non-pliable
 Use of bioresources by multinational companies
Q13 and organisations without authorisation from the
concerned country and its people is called
A. Bio-infringement
B. Biopatent
C. Biopiracy

D. Bio-exploitation
 DISCUSSION

Biopiracy

Term used to refer to the use of bio-resources by

multinational companies and other organisations
without proper authorisation from the countries and
people concerned without compensatory payment
 Use of bioresources by multinational companies
Q13 and organisations without authorisation from the
concerned country and its people is called
A. Bio-infringement
B. Biopatent
C. Biopiracy

D. Bio-exploitation
 The mating of more closely related individuals
Q14 within the same breed for 4-6 generations is
known as
A. Out-crossing
B. Inbreeding
C. Cross-breeding

D. Interspecific hybridisation
 DISCUSSION
● Inbreeding: Mating of more closely
related individuals within the same
breed for 4-6 generations

Inbreeding
 The mating of more closely related individuals
Q14 within the same breed for 4-6 generations is
known as
A. Out-crossing
B. Inbreeding
C. Cross-breeding

D. Interspecific hybridisation
 Colostrum is the milk produced during the initial few
Q15 days of lactation. It is essential to develop resistance for
the new-born babies because it contains antibodies of

A. IgG type
B. IgM type
C. IgA type

D. IgE type
DISCUSSION

Colostrum: Milk produced during

the initial days of lactation
 DISCUSSION
● Colostrum contains antibodies called "secretory
immunoglobulin" (IgA), which are essential to develop
resistance for the infections in newborn babies.

3 days 5 days 6 days 25 days

 Colostrum is the milk produced during the initial few
Q15 days of lactation. It is essential to develop resistance for
the new-born babies because it contains antibodies of

A. IgG type
B. IgM type
C. IgA type

D. IgE type
 All of the following structures of internal ear
Q16 are responsible for maintenance of balance
of the body and posture except
A. Crista ampullaris
B. Macula utriculi
C. Macula sacculi
D. Organ of Corti
DISCUSSION
 DISCUSSION
Sectional view of cochlea ● Organ of Corti is responsible
for hearing
Reissner’s
membrane

Basilar
membrane

Organ of corti
 All of the following structures of internal
Q16 ear are responsible for maintenance of
balance of the body and posture except
A. Crista ampullaris
B. Macula utriculi
C. Macula sacculi
D. Organ of Corti
 Which part of the brain is involved in the
Q17
regulation of sexual behaviour?

A. Corpora quadrigemina
B. Only hypothalamus
C. Limbic system and hypothalamus

D. Cerebellum
 DISCUSSION
Limbic lobe or limbic system along with the
hypothalamus, is involved in the:
● Regulation of sexual behaviour Hypothalamus
● Expression of emotional reactions
● Motivation
 Which part of the brain is involved in the
Q17
regulation of sexual behaviour?

A. Corpora quadrigemina
B. Only hypothalamus
C. Limbic system and hypothalamus

D. Cerebellum
 Read the following statements w.r.t regulation of respiration
and choose the correct option.
Q18 Statement I : Respiratory rhythm centre present in the medulla
region of brain, is primarily responsible for regulation of normal
rhythm of breathing.
Statement II : The role of oxygen in the regulation of respiratory
rhythm is very significant.
A. Statement I is incorrect but statement II is correct
B. Statement I is correct but statement II is incorrect
C. Both statements are correct
D. Both statements are incorrect
 DISCUSSION
The role of oxygen in the
Pons centre (-) (+)
regulation of respiratory rhythm
Rhythm centre is quite insignificant.

(+)
Accessory respiratory
(+)
muscles

Diaphragm
Internal External intercostal
intercostal muscle muscle
 Read the following statements w.r.t regulation of respiration
and choose the correct option.
Q18 Statement I : Respiratory rhythm centre present in the medulla
region of brain, is primarily responsible for regulation of normal
rhythm of breathing.
Statement II : The role of oxygen in the regulation of respiratory
rhythm is very significant.
A. Statement I is incorrect but statement II is correct
B. Statement I is correct but statement II is incorrect
C. Both statements are correct
D. Both statements are incorrect
 How many external rows of ciliated comb
Q19 plates are usually present in the body of
comb jellies?
A. 8
B. 12
C. 10
D. 16
 DISCUSSION
Ctenophores

● Commonly known as sea walnuts or comb jellies

● Exclusively marine
● Body bears eight external rows of ciliated comb
plates
○ Help in locomotion
 DISCUSSION
Retractile tentacle

Anal canal

Ciliary comb plate

Mouth Pharynx

Pleurobrachia
 How many external rows of ciliated comb
Q19 plates are usually present in the body of
comb jellies?
A. 8
B. 12
C. 10
D. 16
 Evolution of DDT resistant mosquitoes
Q20
is an example of

A. Stabilising selection
B. Balancing selection
C. Disruptive selection
D. Directional selection
 DISCUSSION

● Directional selection is when members of one population

survive better than the other members of the same population
Number of individuals

Number of individuals
Peak shifts
in one
direction
 DISCUSSION

Evolution of DDT resistant mosquitoes

is an example of directional selection.
 Evolution of DDT resistant mosquitoes
Q20
is an example of

A. Stabilising selection
B. Balancing selection
C. Disruptive selection
D. Directional selection
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