Question

When tryptophan binds to the trp repressor , this causes the trp repressor to _____ to the trp operator and ____ transcription.

A) bind, inhibit
B) not bind, inhibit
C) bind, activate
D) not bind, activate

Answer 1

When tryptophan binds to the trp repressor, it causes the repressor to bind to the trp operator and inhibit transcription.

Step-by-step explanation:

When tryptophan binds to the trp repressor, it causes the repressor to bind to the trp operator and inhibit transcription. This binding of the trp repressor at the operator physically blocks the RNA polymerase from binding and transcribing the downstream genes. Therefore, the correct answer is option A) bind, inhibit.