81.
Who proved that DNA is basic genetic material?
A
Griffith
B
Watson
C
Boveri and Sutton
D
Hershey and Chase
Answer :
Hershey and Chase
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82.
A DNA with unequal nitrogen bases would most probably be
A
single stranded
B
double stranded
C
triple stranded
D
four stranded
Answer :
single stranded
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83.
An octamer of 4 histones complexed with DNA forms
A
endosome
B
nucleosome
C
mesosome
D
centromere
Answer :
nucleosome
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84.
Out of A-T, G-C pairing, bases of DNA may exist in alternate valency state owing to arrangement called
A
analogue substitution
B
tautomerisational mutation
C
frame-shift mutation
D
point mutation
Answer :
tautomerisational mutation
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85.
In negative operon
A
co-repressor binds with repressor
B
co-repressor does not bind with repressor
C
co-repressor binds with inducer
D
CAMP have negative effect on lac operon
Answer :
co-repressor binds with repressor
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86.
Which of the following RNAs should be most abundant in animal cell?
A
t-RNA
B
m-RNA
C
mi-RNA
D
r-RNA
Answer :
r-RNA
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87.
Expressed Sequence Tags (ESTs) refers to:
A
Genes expressed as RNA
B
Polypeptide expression
C
DNA polymorphism
D
Novel DNA sequences
Answer :
Genes expressed as RNA
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88.
Extra-nuclear inheritance occurs in
A
Killer strain in Paramecium
B
Colour blindness
C
Phenylketonuria
D
Tay sach disease
Answer :
Killer strain in Paramecium
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89.
DNA replication is
A
conservative and discontinuous
B
semiconservative and semi discontinuous
C
semiconservative and discontinuous
D
conservative
Answer :
semiconservative and discontinuous
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90.
The unequivocal proof of DNA as the genetic material came from the studies on a
A
bacterium
B
fungus
C
viroid
D
bacterial virus
Answer :
bacterial virus
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