The Molecule That Functions as a Corepressor for the Trp

Question

The molecule that functions as a corepressor for the trp operon is
A)glucose.
B)cAMP.
C)tryptophan.
D)CAP.
E)lactosE.

Accepted Answer

The trp operon is responsible for the biosynthesis of tryptophan. When levels of tryptophan are high, it functions as a corepressor, binding to the repressor protein and activating it to bind to the operator sequence, thus preventing transcription.