In the tryptophan operon, the repressor actively binds to the operator when:

Question

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The tryptophan operon is regulated by a repressor protein that becomes active when tryptophan binds to it. This binding changes the shape of the repressor, allowing it to bind to the operator region of the operon and block RNA polymerase from transcribing the genes needed for tryptophan synthesis. This is a feedback inhibition mechanism, where the presence of sufficient tryptophan effectively shuts down its own production pathway.

In the Tryptophan Operon, the Repressor Actively Binds to the Operator