Transcription and Regulation
The closed complex at bacterial promoters is

in equilibrium with free RNA polymerase and the promoter
not affected by activator proteins
not affected by promoter mutations
bound more tightly when repressors are present

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Transcription and Regulation
Most transcripts of protein coding genes are cleaved

at the 5' end immediately after a poly adenylation signal
at the 3' end just before a poly adenylation signal
at the 3' end just after a poly adenylation signal
at the 5' end immediately before a poly adenylation signal

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

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