Q. Among the following diagrams, which one represents the correct process of DNA replication?
A) [image:6_image30.png]
B) [image:6_image31.png]
C) [image:6_image32.png]
D) [image:6_image33.png]
Explanation
DNA replication is semi-conservative in which each parental strand acts as template. On template with polarity 3’ → 5’, continuous replication occurs because DNA polymerase functions actively in 5’ → 3’ direction only. On template with polarity 5’ → 3’, discontinuous replication occurs in 3’ → 5’ direction. Thus, one leading and one lagging strands are formed. Later the fragments on lagging strand are joined by DNA ligase.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.