Question

Which statement best describes strand characteristics as it relates to DNA replication?

a. The leading and lagging strands are both built continuously.
b. The leading and lagging strands are both built in fragments.
c. The lagging strand is built continuously, and the leading strand is built in pieces.
d. The leading strand is built continuously, and the lagging strand is built in pieces

Answer 1

The correct option is D. The leading strand is built continuously, and the lagging strand is built in pieces

Step-by-step explanation:

The leading strand of the DNA can be described as the strand that is made in the 5'-3' direction. Since the replication fork works in this direction, hence the leading strand is synthesized continuously.

The lagging strand of the DNA can be described as the strand that forms in the direction of 3'-5'. Since this direction is opposite to the direction of the replication fork, hence the lagging strand is not formed continuously. It is formed in fragments which are known as the Okazaki fragments.