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NEET Biology 2021 PYQs
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100 questions in NEET 2021
Receptors for sperm binding in mammals are
present on:
A
Corona radiata
B
Vitelline membrane
C
Perivitelline space
D
Zona pellucida
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Match List-I with List-II.
List-I
List-II
(A)Vaults
(I)Entry of sperm through Cervix is blocked
(B)IUDs
(II)Removal of Vas deferens
(C)Vasectomy
(III)Phagocytosis of sperms within the Uterus
(D)Tubectomy
(IV)Removal of fallopian tube
Choose the correct answer from the options given below:
A
A-IV, B-II, C-I, D-III
B
A-I, B-III, C-II, D-IV
C
A-II, B-IV, C-III, D-I
D
A-III, B-I, C-IV, D-II
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Veneral diseases can spread through:
A
A, B and C only
B
B, C and D only
C
B and C only
D
A and C only
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Which one of the following is an example of
Hormone releasing IUD?
A
CuT
B
LNG 20
C
Cu 7
D
Multiload 375
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In a cross between a male and female, both
heterozygous for sickle cell anaemia gene, what
percentage of the progeny will be diseased?
A
50%
B
75%
C
25%
D
100%
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If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it ?
A
T : 20; G : 30; C : 20
B
T : 20; G : 20; C : 30
C
T : 30; G : 20; C : 20
D
T : 20; G : 25; C : 25
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Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?
A
DNA dependent DNA polymerase
B
DNA dependent RNA polymerase
C
DNA Ligase
D
DNase
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Which of the following RNAs is not required for the synthesis of protein?
A
mRNA
B
tRNA
C
rRNA
D
siRNA
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Which of the following is not an objective of
Biofortification in crops?
A
Improve protein content
B
Improve resistance to diseases
C
Improve vitamin content
D
Improve micronutrient and mineral content
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Match List-I with List-II.
List-I
List-II
(A)Aspergillus niger
(I)Acetic Acid
(B)Acetobacter aceti
(II)Lactic Acid
(C)Clostridium butylicum
(III)Citric Acid
(D)Lactobacillus
(IV)Butyric Acid
Choose the correct answer from the options given below:
A
A-I, B-II-, C-III, D-IV
B
A-II, B-III, C-I, D-IV
C
A-IV, B-II, C-I, D-III
D
A-III, B-I, C-IV, D-II
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