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Transcription and Regulation

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

Both DNA & RNA polymerase
DNA polymerase
RNA polymerase
DNA molecule

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Transcription and Regulation
The RNA polymerases that transcribe bacterial DNA are

interchangable with DNA polymerases
multisubunit enzymes
highly glycosylated in their active forms
only active inside the cell

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Transcription and Regulation
Transcription factors are

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

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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
RNA polymerase I
none of these
RNA polymerase II

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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
The closed complex at bacterial promoters is

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

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