The sigma factor protein's role in transcription in E.coli includes which of the following?
A)forms part of the core enzyme required for transcription initiation
B)helps the holoenzyme to bind to the promoter
C)contributes to the proof reading activity of RNA polymerase
D)plays a role in transcription termination
E)All of the answer options are correct.

Question

Quizplus · Accepted Answer

The sigma factor protein helps the holoenzyme to bind to the promoter, but it does not contribute to proofreading or play a role in termination. It does form part of the core enzyme required for transcription initiation, but this is not its primary role. Therefore, option B is the best choice.

The Sigma Factor Protein's Role in Transcription in E