Transcription and Regulation
Transcription by E. coli polymerase occurs in

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

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Transcription and Regulation
The function of the sigma factor of RNA polymerase is to

assure that transcription ends at the proper point
assure that translation begins at the proper point
assure that translation ends at the proper point
assure that transcription begins at the proper point

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