If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then ________.
A) the amino acid inactivates the repressor
B) the repressor is active in the absence of the amino acid
C) the amino acid acts as a corepressor
D) the amino acid turns on transcription of the operon

Question

Quizplus · Accepted Answer

The trp operon is a repressible operon where the presence of the amino acid (tryptophan) acts as a corepressor, activating the repressor to bind to the operator and inhibit transcription.

If a Particular Operon Encodes Enzymes for Making an Essential