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Transcription and Regulation

Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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Transcription and Regulation
RNA polymerase holoenzyme initiates transcription which involves

recognition of the -10 sequence and -35 sequence
recognition of the -35 sequence only
recognition of the -10 sequence only
None of these

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

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

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

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

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Transcription and Regulation
Transcription factors are

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

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

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