Base mismatch is due to:
Substitution of a base with another one
Incorrect pairing of bases
Nucleotides damage
Base mismatches take place:
During DNA replication
After DNA replication
During transcription
Tobacco smoke can cause:
Single strand breaks
Double strand breaks
Chemical changes to nucleotides
For homologous recombination to occur:
Cell needs a similar copy of damaged DNA
Broken ends are fused together
Base excision repair takes place
Which DNA repair pathway deals with DNA damage that causes distortion of double- stranded helix?
Base excision repair
Mismatch repair
Nucleotide excision repair
Changes in the DNA are always bad