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Transcription and Regulation

Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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Transcription and Regulation
Promoters for tRNAs are located

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

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Transcription and Regulation
In prokaryotes, transcription is

terminated by the stop codon
terminated by a poly A sequence
terminated by a start codon
terminated by a protein called rho

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

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

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Transcription and Regulation
Transcription of each set of rRNA genes by RNA polymerasel produces

a single 5S rRNA precursor molecule
a single 28S rRNA precursor molecule
a single 18S rRNA precursor molecule
a single 45S rRNA precursor molecule

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Transcription and Regulation
Transcription factors are

proteins which bind to DNA and regulate transcription
TATA boxes
CATT boxes
promoters

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