A Mutation in the LacI Gene Results in an Active

question 17

Multiple Choice

A mutation in the lacI gene results in an active repressor protein that can no longer bind allolactose.Which would be true of the phenotype of the mutant strain?

• A) It would be constitutive for β-galactosidase expression.
• B) It would overexpress LacZ.
• C) It would be the same as the wild-type strain.
• D) It would repress β-galactosidase when lactose is present.
• E) It would be overexpress β-galactosidase when lactose is present.

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