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Transcription and Regulation

Transcription and Regulation
Transcription begins

none of these
at the start codon
downstream from the start codon
upstream from the start codon

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Transcription and Regulation
Promoters for tRNAs are located

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

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Transcription and Regulation
Upstream regions which are essential for correct transcription are called

enhancers
promoters
start codons
transcription factors

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Transcription and Regulation
The RNA polymerases that transcribe bacterial DNA are

highly glycosylated in their active forms
only active inside the cell
interchangable with DNA polymerases
multisubunit enzymes

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Transcription and Regulation
Immediately after transcription

a methylated guanine cap is added to the 31 end of the transcript
both (a) and (b)
a methylated guanine cap is added to the 51 end of the transcript
a poly adenylation signal is added

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Transcription and Regulation
The closed complex at bacterial promoters is

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

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