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NEET Biology 2021 PYQs
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100 questions in NEET 2021
Which of the following are not secondary
metabolites in plants?
A
Morphine, codeine
B
Amino acids, glucose
C
Vinblastin, curcumin
D
Rubber, gums
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Which of the following stages of meiosis involves
division of centromere?
A
Metaphase I
B
Metaphase II
C
Anaphase II
D
Telophase II
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Match List-I with List-II.
List-I
List-II
(A)Cohesion
(I)More attraction in liquid phase
(B)Adhesion
(II)Mutual attraction among water molecules
(C)Surface tension
(III)Water loss in liquid phase
(D)Guttation
(IV)Attraction towards polar surfaces
Choose the correct answer from the options given below:
A
A-IV, B-III, C-II, D-I
B
A-III, B-I, C-IV, D-II
C
A-II, B-I, C-IV, D-III
D
A-II, B-IV, C-I, D-II
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The first stable product of CO2 fixation in sorghum is:
A
Pyruvic acid
B
Oxaloacetic acid
C
Succinic acid
D
Phosphoglyceric acid
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The site of perception of light in plants during
photoperiodism is:
A
Shoot apex
B
Stem
C
Axillary bud
D
Leaf
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The plant hormone used to destroy weeds in a field
is:
A
IAA
B
NAA
C
2,4-D
D
IBA
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Plants follow different pathways in response to
environment or phases of life to form different kinds of structures. This ability is called:
A
Elasticity
B
Flexibility
C
Plasticity
D
Maturity
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Which of the following plants is monoecious?
A
Carica papaya
B
Chara
C
Marchantia polymorpha
D
Cycas circinalis
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A typical angiosperm embryo sac at maturity is:
A
8-nucleate and 7-celled
B
7-nucleate and 8-celled
C
7-nucleate and 7-celled
D
8-nucleate and 8-celled
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The term used for transfer of pollen grains from
anthers of one plant to stigma of a different plant
which, during pollination, brings genetically different types of pollen grains to stigma, is :
A
Xenogamy
B
Geitonogamy
C
Chasmogamy
D
Cleistogamy
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