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

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

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Transcription and Regulation
The major function of RNA polymerase's sigma factor is

recognition of the translational stop sequence
recognition of the transcriptional stop sequence
recognition of the translational start sequence
recognition of the transcriptional start sequence

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Transcription and Regulation
Which of the following conditions would cause the release of the lac repressor protein from the lac operator site on DNA?

Both (b) and (c)
Presence of lactose in the growth media
Presence of IPTG (isopropyl thiogalactoside) in the growth media
Presence of glucose in the growth media

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