. The sigma factor of RNA polymerase ensures


A.         The correction of amino acid sequence in polypeptide chain

B.         That RNA polymerase binds stably to DNA at any site

C.         That DNA polymerase binds stably to RNA only at promoter site to cause replication of RNA

D.         That RNA polymerase binds stably to DNA only at promoter site to initiate transcription

Best Answer

D.        A sigma factor (σ factor) is a prokaryotic transcription initiation factor that must be part of RNA polymerase (RNAP) for specific binding to promoter sites on DNA.

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