In E. coli, to repair a thymine dimer by nucleotide excision repair, in which order do the necessary enzymes act?
a. nuclease, DNA polymerase III, RNA primase
b. helicase, DNA polymerase I, DNA ligase
c. nuclease, DNA polymerase I, DNA ligase
d. DNA ligase, nuclease, helicase
Answer: c. nuclease, DNA polymerase I, DNA ligase