Which DNA repair system or mechanism acts as the second line of defense against mutational error that occurs as the result of DNA replication?
A) Excision
B) Mismatch
C) Proofreading
D) Telomerase
E) Ligation

Question

Quizplus · Accepted Answer

Mismatch repair is the DNA repair system or mechanism that acts as the second line of defense against mutational errors that occur as a result of DNA replication. This system recognizes and repairs mismatched base pairs that were not corrected by proofreading during DNA replication. Excision repair is another type of DNA repair mechanism that repairs DNA damage caused by environmental factors such as UV radiation, while proofreading is a process that occurs during DNA replication to correct errors made by DNA polymerase. Telomerase is an enzyme that adds repetitive DNA sequences to the ends of chromosomes to prevent degradation, and ligation is the process of linking two DNA strands together.

Which DNA Repair System or Mechanism Acts as the Second