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Transcription and Regulation

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

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

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Transcription and Regulation
Transcription by E. coli polymerase occurs in

two phases known as initiation and termination
None of these
three phases known as initiation, elongation and termination
four phases known as initiation, propagation, 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
Enhancers are regions that

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

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Transcription and Regulation
The binding of lac repressor to DNA could be considered to be analogous to

competitive inhibition of an enzyme
allosteric effects in enzyme regulation
mixed-type inhibition of an enzyme
uncompetitive inhibition of an enzyme

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Transcription and Regulation
The RNA polymerases that transcribe bacterial DNA are

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

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