What is the name of the built-in corrective mechanism that acts as an immediate editor during replication?

Answer

$3'$ to $5'$ exonuclease activity

When the polymerase incorporates a mismatched base, the built-in corrective mechanism that acts as an immediate editor is known as $3'$ to $5'$ exonuclease activity.

What is the name of the built-in corrective mechanism that acts as an immediate editor during replication?
DNAaccuracyreplicationProofreading