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Transcription and Regulation

Transcription and Regulation
RNA polymerase in prokaryotes has a removable

sigma subunit
alpha subunit
beta subunit
both (a) and (b)

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Transcription and Regulation
Enhancers are regions that

bind RNA polymerase
modulate transcription
are CAT box binding proteins
are adjacent to the TATA box

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Transcription and Regulation
In both eukaryotes and prokaryotes, a promoter region that is rich in AT bases is called as

CATT
SV40 region
TATA box
Shine Dalgarno region

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Transcription and Regulation
The closed complex at bacterial promoters is

in equilibrium with free RNA polymerase and the promoter
bound more tightly when repressors are present
not affected by promoter mutations
not affected by activator proteins

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Transcription and Regulation
Which of the following is necessary for transcription to occur?

DNA molecule
RNA polymerase
Both DNA & RNA polymerase
DNA polymerase

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Transcription and Regulation
RNA polymerase holoenzyme initiates transcription which involves

recognition of the -10 sequence only
recognition of the -35 sequence only
recognition of the -10 sequence and -35 sequence
None of these

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