32) What possible effect would promoter up mutations have on lac operon regulati

Question

32) What possible effect would promoter up mutations have on lac operon regulation? a) transcription is independent of lactose presence or absence b) transcription is independent on glucose presence or absence c transcription is independent of the lacl repressor presence or absence d) transcription is independent of CAP/cAMP presence e) a and c f) b and d g) none of the above e or absence 33) Which is false concerning the trp operon a) When there is no charged tryptophanyl tRNA region 2 and 3 pair causing antitermination of trp leader sequence transcription b) When there is charged tryptophanyl tRNA region 3 and 4 pair causing termination of trp leader sequence transcription c When starved for other amino acids region 1 and 2 pair, so do regions 3 and 4 pair causing termination of trp leader sequence transcription d) tryptophan acts as a co- repressor, binds to the trp repressor and together they prevent transcription of the trp operon e) a and b f) e and d

Explanation / Answer

32)E)a and c

33)D)tryptophan acts as a co-repressor, binds to the trp repressor and together they prevent transcription of the trp operation

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