DNA is constantly exposed to damage from external and internal sources. DNA damage occurs when there are changes to the structure of DNA that can disrupt its proper functioning. Cells have developed multiple pathways to repair DNA damage and prevent mutations, including base excision repair, nucleotide excision repair, and mismatch repair. These repair pathways help maintain the integrity of the genome and prevent diseases caused by mutations.

1. Tridip Boruah
Assistant Professor
Department of Botany
M.C College, Barpeta
DNA DAMAGE AND REPAIR