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NEET Zoology PYQs
Class XI & Class XII
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🧬 Zoology
📘 Class XI & XII
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407 questions in Zoology
Under which of the following conditions will there
be no change in the reading frame of following
mRNA?
A
Deletion of GGU from 7th , 8th and 9th positions
B
Insertion of A at G at 4th and 5th positions respectively
C
Deletion of G from 5th position
D
Insertion of G at 5th position
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What is the genetic disorder in which an individual
has an overall masculine development, gynaecomastia and is sterile?
A
Edward syndrome
B
Turner's syndrome
C
Klinefelter's syndrome
D
Down's syndrome
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Variations caused by mutation, as proposed by Hugo
de Vries, are:
A
random and directionless
B
random and directional
C
small and directional
D
small and directionless
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n a species, the weight of newborn ranges from 2
to 5 kg. 97% of the newborn with an average weight
between 3 to 3.3kg survive whereas 99% of the
infants born with weights from 2 to 2.5 kg or 4.5
to 5 kg die. Which type of selection process is taking place?
A
Stabilizing Selection
B
Directional Selection
C
Disruptive Selection
D
Cyclical Selection
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Match the hominids with their correct brain size :
(A)Homo habilis
(I)900 cc
(B)Homo neanderthalensis
(II)1350 cc
(C)Homo erectus
(III)650-800 cc
(D)Homo sapiens
(IV)400 cc
Select the correct option.
A
(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
B
(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
C
(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
D
(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
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Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.
A
Salmonella typhi/Widal test
B
Salmonella typhi/Anthrone test
C
Streptococcus pneumoniae/Widal test
D
Plasmodium vivax/UTI test.
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Concanavalin A is:
A
an alkaloid
B
a lectin
C
an essential oil
D
a pigment
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Which of the following immune responses is
responsible for rejection of kidney graft?
A
Cell-mediated immune response
B
Inflammatory immune response
C
Humoral immune response
D
Cell-mediated immune response
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Drug called 'Heroin' is synthesized by:
A
methylation of morphine
B
glycosylation of morphine
C
acetylation of morphine
D
nitration of morphine
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What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?
A
Body temperature
B
Moist surface of midgut
C
Acidic pH of stomach
D
Alkaline pH of gut
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