The proofreading of the DNA occurs in the _________.
A)5' to 3' direction
B)3' to 5' direction
C)Both directions

Question

Quizplus · Accepted Answer

The proofreading of DNA occurs in the 3' to 5' direction. This is because DNA polymerase can only add nucleotides to the 3' end of a growing strand. As it moves along the template strand in the 5' to 3' direction, it checks for correct base pairing and can excise any errors in the 3' to 5' direction using its exonuclease activity.

The Proofreading of the DNA Occurs in the _________