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Transcription and Regulation

Transcription and Regulation
The nucleons of eukaryotic cell has

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

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

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

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Transcription and Regulation
Transcription by E. coli polymerase occurs in

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

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Transcription and Regulation
The closed complex at bacterial promoters is

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

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Transcription and Regulation
Enhancers are regions that

bind RNA polymerase
are adjacent to the TATA box
are CAT box binding proteins
modulate transcription

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Transcription and Regulation
The regions of a gene located at -10 and -35, with respect to the start of transcription, are termed

start codons.
promoters.
oriC regions.
Shine Dalgarno sequences.

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