what are the four enzymes used in dna replication?
['Helicase (unwinds the DNA double helix)', 'Gyrase (relieves the buildup of torque during unwinding)', 'Primase (lays down RNA primers)', 'DNA polymerase III (main DNA synthesis enzyme)', 'DNA polymerase I (replaces RNA primers with DNA)', 'Ligase (fills in the gaps)']