The Bacterial Repair System That Corrects Mismatched Bases After Polymerization

question 44

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)older DNA is more likely to contain errors.
• C)older DNA contains methyl groups at specific sequences
• D)newer DNA contains methyl groups at specific sequences
• E)the DNA polymerase is attached to the new strand

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