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Transcription and Regulation

Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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Transcription and Regulation
Rho-dependent termination of transcription in E. coli

both (a) and (b)
requires about 50 nucleotides of uncomplexed mRNA
removes mRNA and holoenzyme from the DNA
requires ATP

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Transcription and Regulation
Which of the following is necessary for transcription to occur?

RNA polymerase
DNA molecule
DNA polymerase
Both DNA & RNA polymerase

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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
Transcription of each set of rRNA genes by RNA polymerasel produces

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

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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

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

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