Genetics And Evolution Molecular Basis Of Inheritance 10-P-7

Question: What occurs when lactose is present in the lac operon system?

A) The repressor binds more tightly to the operator. B) Lactose binds to the repressor, inactivating it. C) RNA polymerasee is degraded. D) The operon is permanently turned off.

Answer: B) Lactose binds to the repressor, inactivating it.



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