Biology, 23.12.2019 19:31 erikacastro2421
E. coli can metabolize either glucose or lactose. however, when both are present, e. coli preferentially metabolize glucose. which of the following is not part of the biochemical mechanisms involved in that metabolic preference.
1. the presence of glucose reduces the level of camp.
2. catabolite activator protein (cap) is active only in the absence of camp.
3. cap binding assists in the formation of a transcription complex by rna polymerase at the lac promoter
4. cap is a positive control factor whose presence is necessary to initiate transcription at dependent promoters.
5. none of the above
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