Question

An operon encodes enzymes for making an essential amino acid and is regulated like the trp operon. Which of the statements is true? A. The amino acid inactivates the repressor. B. The amino acid acts as a corepressor. C. Inducible enzymes are produced. D. The repressor is active in the absence of the amino acid.

Answer 1

B is correct; the amino acid acts as a corepressor.