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Transcription and Regulation

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

a translation bubble
replication bubble
transcription bubble
none of these

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

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

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Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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Transcription and Regulation
The closed complex at bacterial promoters is

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

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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

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

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Transcription and Regulation
Promoters for tRNAs are located

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

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