In the presence of the repressor molecule and the absence of free tryptophan,the trp operon is:
A)constitutively transcribed.
B)derepressed.
C)induced.
D)repressed.
E)transcribed but not translated.

Question

Quizplus · Accepted Answer

In the absence of free tryptophan, the repressor molecule is inactive, allowing the trp operon to be derepressed, meaning transcription can occur.

In the Presence of the Repressor Molecule and the Absence