Previous Year Paper year:2021 : NEET-XII-Biology

NEET-XII-Biology

Previous Year Paper year:2021

with Solutions - page 4

Match List - I with List - II.

List I		List II
a	S phase	i	Proteins are synthesized
b	`` G_2 `` phase	ii	Inactive phase
c	Quiescent stage	iii	Interval between mitosis and initiation of DNA replication
d	`` G_1 `` phase	iv	DNA replication

Choose the correct answer from the options given below.
(A)
(a) - (iii) ,
(b) - (ii) ,
(c) - (i),
(d) - (iv)
(B)
(a) - (iv) ,
(b) - (ii) ,
(c) - (iii),
(d) - (i)
(C)
(a) - (iv) ,
(b) - (i) ,
(c) - (ii),
(d) - (iii)
(D)
(a) - (ii) ,
(b) - (iv) ,
(c) - (iii),
(d) - (i)

digAnsr: C

Qstn #45
Now a days it is possible to detect the mutated gene causing cancer by allowing radioactive probe to hybridise its complimentary DNA in a clone of cells, followed by its detection using autoradiography because :
(A)mutated gene partially appears on a photographic film.
(B)mutated gene completely and clearly appears on a photographic film.
(C)mutated gene completely and clearly appears on a photographic film.
(D)mutated gene does not appear on photographic film as the probe has complimentarity with it.
digAnsr: D
:

Qstn #46
Plasmid `` pBR322 `` has PstI restriction enzyme site within gene `` a m p^{R} `` that confers ampicillin resistance. If this enzyme is used for inserting a gene for `` \beta `` -galactoside production and the recombinant plasmid is inserted in an E.coli strain
(A)it will not be able to confer ampicillin resistance to the host cell.
(B)the transformed cells will have the ability to resist ampicillin as well as produce `` \beta `` -galactoside.
(C)it will lead to lysis of host cell.
(D)it will be able to produce a novel protein with dual ability.
digAnsr: A
:

Qstn #47
Match Column - I with Column - II.

List I List II

a
i Brassicaceae

b
ii Liliaceae

c
iii Fabaceae

d
iv Solanaceae

Select the correct answer from the options given below.
(A)
(a) - (iii) ,
(b) - (iv),
(c) - (ii),
(d) - (i)
(B)
(a) - (i) ,
(b) - (ii),
(c) - (iii),
(d) - (iv)
(C)
(a) - (ii) ,
(b) - (iii),
(c) - (iv),
(d) - (i)
(D)
(a) - (iv) ,
(b) - (ii),
(c) - (i),
(d) - (iii)

digAnsr: A
:

List I
a	i	Brassicaceae
b	ii	Liliaceae
c	iii	Fabaceae
d	iv	Solanaceae

Qstn #48
Which of the following statements is incorrect?
(A)Both ATP and `` NADPH + H^+ `` are synthesized during non-cyclic photophosphorylation.
(B)Stroma lamellae have PS I only and lack NADP reductase.
(C)Grana lamellae have both PS I and PS II.
(D)Cyclic photophosphorylation involves both PS I and PS II.
digAnsr: D
:

Qstn #49

Match List - I with List - II.

List I		List II
a	Protein	i	C = C double bonds
b	Unsaturated fatty acid	ii	Phosphodiester bonds
c	Nucleic acid	iii	Glycosidic bonds
d	Polysaccharide	iv	Peptide bonds

Choose the correct answer from the options given below.
(A)
(a) - (iv) ,
(b) - (i) ,
(c) - (ii) ,
(d) - (iii)
(B)
(a) - (i) ,
(b) - (iv) ,
(c) - (iii) ,
(d) - (ii)
(C)
(a) - (ii) ,
(b) - (i) ,
(c) - (iv) ,
(d) - (iii)
(D)
(a) - (iv) ,
(b) - (iii) ,
(c) - (i) ,
(d) - (ii)

digAnsr: A

Qstn #50
DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as:
(A)Satellite DNA
(B)Repetitive DNA
(C)Single nucleotides
(D)Polymorphic DNA
digAnsr: B
: