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Transcription and Regulation

Transcription and Regulation
Transcription begins

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

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Transcription and Regulation
In both eukaryotes and prokaryotes, a promoter region that is rich in AT bases is called as

SV40 region
CATT
Shine Dalgarno region
TATA box

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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
Which of the following is necessary for transcription to occur?

Both DNA & RNA polymerase
DNA molecule
RNA polymerase
DNA polymerase

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

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

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Transcription and Regulation
In eukaryotes, there are three different RNA polymerases. The RNA polymerase responsible for transcription of mRNA is

RNA polymerase III
none of these
RNA polymerase II
RNA polymerase I

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