In prokaryotes,the RNA polymerase holoenzyme consists of
A)the core polymerase plus two alpha subunits.
B)the core polymerase plus two beta subunits.
C)the core polymerase plus two alpha subunits,two beta subunits,and a sigma subunit.
D)the core polymerase plus a sigma subunit.
E)two alpha subunits,two beta subunits,and two sigma subunits.

Question

Quizplus · Accepted Answer

The RNA polymerase holoenzyme in prokaryotes consists of the core polymerase plus a sigma subunit. The sigma subunit is necessary for the recognition of the promoter region on DNA and the initiation of transcription. Once transcription has begun, the sigma subunit is released, leaving behind the core polymerase to continue elongation.

In Prokaryotes,the RNA Polymerase Holoenzyme Consists of