Cells maintain genome integrity through several DNA repair systems. Which is true?
- A
Only A
- Bcheck_circle
Both A and B
- C
Excision repair removes damaged bases or larger lesions
- D
Mismatch repair fixes errors made during replication
Explanation
Cells use mismatch repair, base excision repair, nucleotide excision repair, double-strand break repair, etc. Defects in repair pathways can predispose to cancer (e.g., HNPCC).