Biology Concepts Transparencies 39 3' 5' 5' 3' Lagging strand Leading strand DNA ligase Biology Concepts 39 DNA polymerase Okazaki fragments 3' DNA polymerase RNA primer 5' DNA replication Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Helicase Direction of replication Parental DNA 3' 5'