Which of the Following Mutants are Noninducible

Question

Which of the following mutants are noninducible? A) lacI^S B) lacO^C C) lacI^- D) lacI⁺ E) lacO⁺

Accepted Answer

The lacI^S mutant produces a super-repressor that cannot be inactivated by the inducer, making the operon noninducible.