Proofreading activity to maintain the fidelity of DNA synthesis

Q. Proofreading activity to maintain the fidelity of DNA synthesis

A.            occurs after the synthesis has been completed

B.            is a function of the 3′-5′ exonuclease activity of the DNA polymerases

C.            requires the presence of an enzyme separate from the DNA polymerases

D.            occurs in prokaryotes but not eukaryotes

Answer: is a function of the 3′-5′ exonuclease activity of the DNA polymerases