In nucleotide excision repair, damaged dna is excised by what enzyme(s)? in nucleotide excision repair, damaged dna is excised by what enzyme(s)? ligase nuclease dna polymerases primase helicase

The correct answer is helicase and nuclease.

Nucleotide excision repair is a mechanism for DNA repair which removes DNA damage often induced by ultraviolet light (UV). The mechanism includes recognition of damage, dual incision, repair, and ligation.

The step of incision occurs via enzyme which has helicase activity (unwind DNA and cut it). The same enzyme also has endonuclease activity (removal of a damage-containing DNA).

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.