Q4.7. In DNA replication, what is the difference between the leading and lagging strands? In the leading strand, DNA is synthesized 53, while the direction of synthesis in the lagging strand may be either 53 or 35, The leading strand is composed of DNA only, while the lagging strand is composed of both RNA and DNA. After extension, the leading strand is continuous, while the lagging strand is composed of disconnected fragments. The leading strand is synthesized only by DNA polymerase III, while the lagging strand is synthesized only by DNA polymerase I. Q4.8. DNA replication involves a series of steps, including initiation, making primers, extension, and connecting DNA fragmnts. The cell uses different enzymes in a particular order to accomplish these steps. Which of the following represents the correct general order of enzyme use? (Hint: You may want to use the glossary to review terms.) DNA polymerases, helicase, primase, ligase Helicase, ligase, primase, DNA polymerases Helicase, primase, DNA polymerases, ligase Primase, helicase, DNA polymerases, ligase Q4.9. Which of the following segments of DNA would require the most energy to separate the two strands?.