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Transcription and Regulation

Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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Transcription and Regulation
Enhancers are regions that

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

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Transcription and Regulation
The regions of a gene located at -10 and -35, with respect to the start of transcription, are termed

oriC regions.
promoters.
Shine Dalgarno sequences.
start codons.

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Transcription and Regulation
RNA polymerase holoenzyme initiates transcription which involves

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

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Transcription and Regulation
Transcription by E. coli polymerase occurs in

two phases known as initiation and termination
three phases known as initiation, elongation and termination
four phases known as initiation, propagation, elongation and termination
None of these

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Transcription and Regulation
Promoters for tRNAs are located

none of these
both (a) and (b)
downstream from the start codon
upstream from the start codon

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