DNA DNA is copied by DNA polymerase 。In the5'→3'direction Initiated by an RNA primer Leading strand synthesized continuously Lagging strand synthesized discontinuously 。Okazaki fragments RNA primers are removed and Okazaki fragments joined by a DNA polymerase and DNA ligase• DNA is copied by DNA polymerase • In the 5 → 3 direction • Initiated by an RNA primer • Leading strand synthesized continuously • Lagging strand synthesized discontinuously • Okazaki fragments • RNA primers are removed and Okazaki fragments joined by a DNA polymerase and DNA ligase DNA