The extraordinary accuracy of the DNA polymerase III enzyme lies in its ability to "proofread" newly synthesized DNA, a function of the enzyme's __________.
A)3′-to-5′ exonuclease activity
B)5′-to-3′ exonuclease activity
C)3′-to-5′ polymerase activity
D)5′-to-3′ polymerase activity
E)3′-to-5′ helicase activity

Question

Quizplus · Accepted Answer

The 3'-to-5' exonuclease activity of DNA polymerase III allows it to remove incorrectly paired nucleotides during DNA synthesis, thus increasing the accuracy of DNA replication.

The Extraordinary Accuracy of the DNA Polymerase III Enzyme Lies