In the Presence of Abundant Tryptophan

Multiple Choice

In the presence of abundant tryptophan:

A) the attenuator stem-loop structure forms,allowing transcription to continue.
B) the attenuator stem-loop structure forms,terminating transcription.
C) the preemptor stem-loop structure forms,allowing transcription to continue.
D) the preemptor stem-loop structure forms,terminating transcription.
E) None of the answer options are correct.