The table below lists several genotypes associated with the lac operon in E.coli.For each,indicate with a "+" or a
"-" whether functional fi- galactosidase would be expected to be produced at induced levels. I+ = wild- type repressor
I- = mutant repressor unable to bind to the operator)
Is = mutant repressor insensitive to lactose)
O+ = wild- type operator
Oc = constitutive operator insensitive to repressor)
Correct Answer:
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Q28: The accompanying table lists several genotypes associated
Q29: When lactose is first introduced into the
Q31: In the accompanying diagram,what type of control,positive
Q32: Present an overview of bacterial gene regulation
Q33: a)Describe by labeled diagram the structural components
Q34: Certain mutations in the regulator gene of
Q35: Explain why lacOc mutations are cis- acting
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