The Bacterial Repair System That Corrects Mismatched Bases After Polymerization

Multiple Choice

The bacterial repair system that corrects mismatched bases after polymerization is able to discriminate between the old and newly made DNA strands because

A) the new strand will contain the incorrect base if a mismatch occurs.
B) the older DNA is more likely to contain errors.
C) the older DNA contains methyl groups at specific sequences.
D) the newer DNA contains methyl groups at specific sequences.
E) the DNA polymerase is attached to the new strand.