Answer
(a) Catabolite repression
Work Step by Step
In catabolite repression, the presence of a preferred nutrient, which is often glucose, represses the synthesis of enzymes that would be used to metabolize some alternative substance.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.