The proofreading mechanism that occurs during DNA replication is conducted through polymerase. ____ activity in ____
a. S' to 3 ' exonuclease; RNA
b. 3' to 5 ' exonuclease; DNA
c. 3' to S' exonuclease; RNA
d. 2' to 3' exonuclease; DNA
e. 5' to 5 ' exonuclease; RNA