Which of the following reactions is required for proofreading during DNA replication by DNA polymerase III?

Q. Which of the following reactions is required for proofreading during DNA replication by DNA polymerase III?

A.            5’ to 3’ exonuclease activity

B.            3’ to 5’ exonuclease activity

C.            3’ to 5’ endonuclease activity

D.            5’ to 3’ endonuclease activity

Answer: 3’ to 5’ exonuclease activity

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