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Transcription and Regulation

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

start codons
promoters
transcription factors
enhancers

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

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Transcription and Regulation
The binding of lac repressor to DNA could be considered to be analogous to

uncompetitive inhibition of an enzyme
competitive inhibition of an enzyme
mixed-type inhibition of an enzyme
allosteric effects in enzyme regulation

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Transcription and Regulation
The complex of RNA polymerase, DNA template and new RNA transcript is called

transcription bubble
a translation bubble
replication bubble
none of these

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Transcription and Regulation
The closed complex at bacterial promoters is

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

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Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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