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

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

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Transcription and Regulation
Transcription begins

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

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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
The RNA polymerases that transcribe bacterial DNA are

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

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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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