A mutant strain of E. coli is found that produces both $\beta$-galactosidase and permease constitutively. What are the MOST likely mutations in this strain?

Question

Quizplus · Accepted Answer

The mutations lacO^c (constitutive operator) and lacI^- (defective repressor) both lead to constitutive expression of the lac operon, resulting in the continuous production of β-galactosidase and permease.

A Mutant Strain of E β\betaβ -Galactosidase and Permease Constitutively

A Mutant Strain of E $\beta$ -Galactosidase and Permease Constitutively