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Transcription and Regulation

Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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Transcription and Regulation
Transcription of each set of rRNA genes by RNA polymerasel produces

a single 45S rRNA precursor molecule
a single 18S rRNA precursor molecule
a single 5S rRNA precursor molecule
a single 28S rRNA precursor molecule

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Transcription and Regulation
The nucleons of eukaryotic cell has

RNA polymerase II
RNA polymerase III
all of these
RNA polymerase I

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Transcription and Regulation
RNA is synthesized on a DNA template in a process called __________ , which utilizes the enzyme __________

transcription, DNA polymerase
replication, DNA polymerase
transcription, RNA polymerase
translation, RNA polymerase

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Transcription and Regulation
The closed complex at bacterial promoters is

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

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Transcription and Regulation
Transcription by E. coli polymerase occurs in

four phases known as initiation, propagation, elongation and termination
two phases known as initiation and termination
None of these
three phases known as initiation, elongation and termination

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