The trp operon is typically characterized as being both under negative control and repressible.

Question

Quizplus · Accepted Answer

The trp operon is regulated by the trp repressor protein, which binds to the operator region and prevents transcription of the genes involved in tryptophan biosynthesis. This is an example of negative control. In addition, the trp operon is also repressible, meaning that the presence of tryptophan in the environment will cause the trp repressor protein to bind to the operator more strongly, further reducing transcription of the operon. Therefore, both negative control and repression are characteristic of the trp operon.

The Trp Operon Is Typically Characterized as Being Both Under