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  3. 1. for the lac operon, explain what would happen a

1. For the lac operon, explain what would happen and why regarding expression of the operon...

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Biology

1. For the lac operon, explain what would happen and whyregarding expression of the operon in each of the followingscenarios. Be sure to include both positive and negative regulationin your explanation. a.) lactose is present, glucose is absent b.)lactose is absent, glucose is present c.) both lactose and glucoseare present d.) lactose is present, glucose is absent, but there isa mutation to the sequence in the CAP site

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3.5 Ratings (266 Votes)
1 The lac operon is present in Ecoli and is required for metabolism of lactose This operon is turned on and off in response to lactose There is catabolite activator protein CAP binding site a promoter site an operator site followed by the three genes lacy lac Z and lac A There is also a lacI regulatory gene which synthesizes the repressor protein The CAP binding site is the positive regulatory site while the operator is the negative regulatory site CAP binding site overlaps with the RNA polymerase binding site in promoter Binding of cAMPCAP complex to CAP binding site will allow the RNA polymerase to bind the promoter As a result there will be optimal transcription of lac genes When repressor binds to the operator it will prevent RNA polymerase from transcribing the lac genes However allolactose    See Answer
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