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NEET Biology 2019 PYQs
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90 questions in NEET 2019
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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Select the incorrect statement:
A
Inbreeding selects harmful recessive genes that
reduce fertility and productivity
B
Inbreeding increases homozygosity
C
Inbreeding is essential to evolve purelines in any
animal
D
Inbreeding helps in accumulation of superior
genes elimination of undesirable genes
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Match the following organisms with the products
they produce:
(A)Lactobacillus
(I)Cheese
(B)Saccharomyces cerevisiae
(II)Curd
(C)Aspergillus niger
(III)Citric Acid
(D)Acetobacter aceti
(IV)Bread
(V)Acetic Acid
Select the correct option.
A
(A)-(II), (B)-(IV), (C)-(V), (D)-(III)
B
(A)-(III), (B)-(IV), (C)-(V), (D)-(I)
C
(A)-(II), (B)-(IV), (C)-(III), (D)-(V)
D
(A)-(II), (B)-(I), (C)-(III), (D)-(V)
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Which of the following can be used as a biocontrol
agent in the treatment of plant disease?
A
Anabaena
B
Chlorella
C
Trichoderma
D
Lactobacillus
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