Exercise: Transcription And Regulation

Questions for: Transcription And Regulation

Which of the following conditions would cause the release of the lac repressor protein from the lac operator site on DNA?
A:
Presence of glucose in the growth media
B:
Presence of lactose in the growth media
C:
Presence of IPTG (isopropyl thiogalactoside) in the growth media
D:
Both (b) and (c)
Answer: D
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The regions of a gene located at -10 and -35, with respect to the start of transcription, are termed
A:
start codons.
B:
oriC regions.
C:
Shine Dalgarno sequences.
D:
promoters.
Answer: D
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Transcription of each set of rRNA genes by RNA polymerasel produces
A:
a single 45S rRNA precursor molecule
B:
a single 5S rRNA precursor molecule
C:
a single 18S rRNA precursor molecule
D:
a single 28S rRNA precursor molecule
Answer: A
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Upstream regions which are essential for correct transcription are called
A:
enhancers
B:
start codons
C:
promoters
D:
transcription factors
Answer: C
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The nucleons of eukaryotic cell has
A:
RNA polymerase I
B:
RNA polymerase II
C:
RNA polymerase III
D:
all of these
Answer: D
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