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Transcription and Regulation

Transcription and Regulation
Upstream regions which are essential for correct transcription are called

transcription factors
promoters
start codons
enhancers

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Transcription and Regulation
Enhancers are regions that

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

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

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

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Transcription and Regulation
The RNA polymerases that transcribe bacterial DNA are

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

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Transcription and Regulation
Transcription by E. coli polymerase occurs in

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

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Transcription and Regulation
In prokaryotes, transcription is

terminated by a start codon
terminated by the stop codon
terminated by a poly A sequence
terminated by a protein called rho

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