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

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

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

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

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Transcription and Regulation
What is a promoter?

A specific sequence of DNA to which a catabolic repressor binds
A specific sequence of DNA to which RNA polymerase binds
A specific DNA sequence to which a restriction endonuclease binds
None of these

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