Which characteristic is exhibited by transcription-termination signals found at the ends of most bacterial operons,such as the trp operon?
A) They encode a nascent RNA with the potential to form hydrogen-bonded hairpin structures.
B) They contain the operator region to which the repressor binds to shut off transcription.
C) They contain the site for the binding of the CAP-cAMP complex to affect catabolite repression.
D) They contain the binding site for the repressor-corepressor complex.
E) They begin with the sequence ATG.

Question

Quizplus · Accepted Answer

Transcription-termination signals in bacterial operons typically encode a nascent RNA that has the potential to form hydrogen-bonded hairpin structures. These structures cause RNA polymerase to stall, leading to termination of transcription. The other options listed refer to other elements commonly found in bacterial operons, but they do not describe the characteristic exhibited by transcription-termination signals.

Which Characteristic Is Exhibited by Transcription-Termination Signals Found at the Ends