Part D Which of the following mutations would result in high

Part D

Which of the following mutations would result in higher-than-normal expression of the trp genes in presence of tryptophan?

Select all that apply.

A. mutations in Region 1 that prevent 1-2 stem loop formation

B. mutations in Region 3 that prevent 3-4 stem loop formation

C. mutations in Region 2 that prevents 2-3 stem loop formation

Answers are bellow two. A and B.

1&2 complimentary loop is stop signal also 3&4

But not 2&3 stem loop. It is basically termed as anti terminator signal.

If mutations occur in the bellow two conditions trp operon over expression occurs.

A. mutations in Region 1 that prevent 1-2 stem loop formation

B. mutations in Region 3 that prevent 3-4 stem loop formation