Mutations in the -35 region of the trp operon would
A)interfere with RNA polymerase binding to the promotor.
B)prevent the repressor from binding to the operator.
C)result in depression of the trp operon.
D)enable the trp operon to be expressed in the absence of tryptophan.

Question

Quizplus · Accepted Answer

The -35 region is the site where RNA polymerase binds to initiate transcription. If mutations occur in this region, then RNA polymerase would not be able to bind properly, resulting in decreased transcription of the trp operon. This would lead to repression of the trp operon, meaning that the genes are turned "off" in the absence of tryptophan.

Mutations in the -35 Region of the Trp Operon Would