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Transcription and Regulation

Transcription and Regulation
The complex of RNA polymerase, DNA template and new RNA transcript is called

transcription bubble
none of these
replication bubble
a translation bubble

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Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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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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Transcription and Regulation
The closed complex at bacterial promoters is

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

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

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

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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 I
RNA polymerase III
RNA polymerase II

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