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Transcription and Regulation

Transcription and Regulation
Promoters for tRNAs are located

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

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Transcription and Regulation
The RNA polymerases that transcribe bacterial DNA are

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

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

CATT
SV40 region
TATA box
Shine Dalgarno region

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Transcription and Regulation
Each tRNA molecule has a cloverleaf secondary structure consisting of

three stem loops
either (a) or (b)
two stem loops
four stem loops

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

DNA molecule
Both DNA & RNA polymerase
DNA polymerase
RNA polymerase

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Transcription and Regulation
The closed complex at bacterial promoters is

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

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