What are the three major mechanisms of DNA repair?

There are three types of excision repair: Base-excision repair. Nucleotide excision repair. Mismatch repair.Click to see full answer. Hereof, what are the major DNA repair mechanisms?At least five major DNA repair pathways—base excision repair (BER), nucleotide excision repair (NER), mismatch repair (MMR), homologous recombination (HR) and non-homologous end joining (NHEJ)—are active throughout different stages of the cell cycle, allowing the cells to repair the DNA damage.Beside above, what are the types of DNA repair? The different types of DNA repair include direct repair, base excision repair, nucleotide excision repair (NER), double-strand break repair (including homologous recombination and nonhomologous end joining), and crosslink repair (Sancar et al., 2004). Similarly, what are the three steps in DNA repair? There are three types of repair mechanisms: direct reversal of the damage, excision repair, and postreplication repair. Direct reversal repair is specific to the damage. For example, in a process called photoreactivation, pyrimidine bases fused by UV light are separated by DNA photolyase (a light-driven enzyme).What is the key concept for DNA repair?DNA repair is a collection of processes by which a cell identifies and corrects damage to the DNA molecules that encode its genome. Other lesions induce potentially harmful mutations in the cell’s genome, which affect the survival of its daughter cells after it undergoes mitosis.