Final answer:
The lagging strand (A) is synthesized in fragments.
Step-by-step explanation:
The lagging strand is one of the two strands formed during DNA replication, and it is synthesized in fragments known as Okazaki fragments. This occurs due to the antiparallel nature of DNA strands and the direction of the DNA polymerase enzyme. As the replication fork progresses, the lagging strand is synthesized discontinuously in short fragments, with each fragment initiated by a separate RNA primer. These Okazaki fragments are later joined together by DNA ligase to form a continuous strand.
The lagging strand is synthesized in the opposite direction to the movement of the replication fork, making it necessary to synthesize it in short fragments. The leading strand, in contrast, is synthesized continuously in the direction of the replication fork movement. This arrangement allows both strands to be synthesized simultaneously, ensuring efficient and accurate DNA replication. The lagging strand synthesis, with its discontinuous fragments, is a crucial aspect of the overall process, allowing for the faithful duplication of the entire DNA molecule.
In summary, (A)the lagging strand is synthesized in fragments due to the directionality of DNA synthesis and the need for the antiparallel orientation of the DNA strands. This process ensures accurate and complete replication of the genetic material during cell division.