101.
During transcription, the DNA site at which RNA polymerase binds is called
A
enhancer
B
promoter
C
regulator
D
receptor
Answer :
promoter
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102.
DNA fragments are:
A
Negatively charged
B
Neutral
C
Either positively or negatively charged depending on their size
D
Positively charged
Answer :
Negatively charged
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103.
A nucleotide is formed of
A
purine, pyrimidine and phosphate
B
purine, sugar and phosphate
C
nitrogen base, sugar and phosphate
D
pyrimidine, sugar and phosphate
Answer :
nitrogen base, sugar and phosphate
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104.
Which one of the following also acts as a catalyst in a bacterial cell ?
A
5s rRNA
B
sn RNA
C
hn RNA
D
23s rRNA
Answer :
23s rRNA
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105.
Uridine, present only in RNA is a
A
Pyrimidine
B
Nucleoside
C
Nucleotide
D
Purine
Answer :
Nucleoside
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106.
Nucleotide arrangement in DNA can be seen by
A
$$X$$-ray crystallography
B
electron microscope
C
ultracentrifuge
D
light microscope
Answer :
$$X$$-ray crystallography
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107.
During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure, what is it's DNA-binding sequence?
A
AATT
B
CACC
C
TATA
D
TTAA
Answer :
TATA
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108.
Removal of introns and joining the exons in a defined order in a transcription unit is called:
A
tailing
B
transformation
C
capping
D
splicing
Answer :
splicing
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109.
The following ratio is generally constant for a given species:
A
$$\frac{{A + G}}{{C + T}}$$
B
$$\frac{{T + C}}{{G + A}}$$
C
$$\frac{{G + C}}{{A + T}}$$
D
$$\frac{{A + C}}{{T + G}}$$
Answer :
$$\frac{{G + C}}{{A + T}}$$
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110.
In transgenics, expression of transgene in target tissue is determined by
A
enhancer
B
transgene
C
promoter
D
reporter
Answer :
reporter
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