With regard to RNA polymerase proofreading ability,which of the following is true?
A)RNA backtracking can remove noncomplementary nucleotides.
B)RNA and DNA polymerase proofreading are essentially identical.
C)There are specialized mRNA repair pathways that remove noncomplementary nucleotides.
D)No proofreading occurs.
E)A 3' → 5' exonuclease fixes all errors in mRNA.

Question

Quizplus · Accepted Answer

RNA polymerase has a mechanism known as backtracking, which allows it to correct errors by removing noncomplementary nucleotides. This process is distinct from the proofreading mechanisms of DNA polymerase, which often involve a 3' → 5' exonuclease activity. There are no specialized mRNA repair pathways akin to DNA repair, and RNA polymerase does not have a dedicated 3' → 5' exonuclease for proofreading like DNA polymerase does.

With Regard to RNA Polymerase Proofreading Ability,which of the Following