Question

which of the following mechanisms removes nucleotides that are paired incorrectly during dna replication?

nucleotide excision repair

chromosomal breakage repair

mismatch repair

telomerase activity

Explanation:

• Nucleotide excision repair fixes DNA damage from UV, chemicals, etc., not mismatched nucleotides during replication.
• Chromosomal breakage repair deals with broken chromosomes, not replication - related mismatches.
• Mismatch repair specifically targets and removes incorrectly paired nucleotides that occur during DNA replication.
• Telomerase activity is involved in adding telomeric DNA to the ends of chromosomes, not in repairing replication - related mismatches.

Answer:

C. mismatch repair