Multiple choice

Choose the true statement for sigma factor.

  1. It works with transcription factors to increase the rate of gene transcription.

  2. Its inhibits the transcriptional activity.

  3. It complexes with RNA polymerase and encodes sequence specificity.

  4. It works with transcription factors to decrease the rate of gene transcription.

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A sigma factor (σ factor) is a protein needed only for initiation of RNA synthesis. It is a bacterial transcription initiation factor that enables specific binding of RNA polymerase to gene promoters. 

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