If RNA polymerase is missing _____ then transcription initiation would not occur but elongation could.
A)amino acids
B)mRNA
C)sigma
D)the holoenzyme

Question

Quizplus · Accepted Answer

Sigma is the subunit of the RNA polymerase holoenzyme that is responsible for recognizing and binding to the promoter region of DNA to initiate transcription. Without sigma, the RNA polymerase would not be able to recognize and bind to the promoter, so transcription initiation would not occur. However, once transcription has been initiated, elongation of the RNA transcript would be carried out by the core RNA polymerase enzyme even in the absence of sigma. Therefore, if sigma is missing, transcription initiation would not occur but elongation could still occur.

If RNA Polymerase Is Missing _____ Then Transcription Initiation Would