Chapter 11, Problem 7TY

 During replication of a DNA molecule, the daughter strands are not produced in exactly the same manner. One strand, the leading strand, is made toward the replication fork, while the lagging strand is made in fragments in the opposite direction. This difference in the synthesis of the two strands is the result of which of the following?

1. a. DNA polymerase is not fast enough to make two leading strands of DNA.
2. b. The two template strands are antiparallel, and DNA polymerase makes DNA only in the 5′ to 3′ direction.
3. c. The lagging strand is the result of DNA breakage due to UV light.
4. d. The cell does not contain enough nucleotides to make two complete strands.