Multiple Choice
The expression of the tryptophan operon is controlled by
A) a repressor that is active when it is alone.
B) a repressor that is inactive when it binds to lactose.
C) a repressor that is active when it binds to tryptophan.
D) an activator that turns the operon on by binding to DNA.
Correct Answer:

Verified
Correct Answer:
Verified
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