Transcription and Regulation
The RNA polymerases that transcribe bacterial DNA are

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

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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 IPTG (isopropyl thiogalactoside) in the growth media
Presence of lactose in the growth media
Presence of glucose in the growth media

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Transcription and Regulation
What is a promoter?

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

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