Q. During DNA replication, Okazaki fragments are used to elongate :
(a) The lagging strand away from the replication fork.
(b) The laaging strand towards the replication fork.
(c) The leading strand away from the replication fork.
(d) The leading strand towards the replication fork.
Solution :
Correct option : A The process in which the DNA is replicated and two copies are synthesized is called DNA replication. It involves the formation of replication fork. The two strands of the DNA helix separate and the new strands are formed on the original strands, known as the template strands. The strand which is synthesized in 3′-5′ direction is the leading strand and the strand which is synthesized in the opposite direction is the lagging strand which contains the Okazaki fragments. This strand is synthesized away from the replication fork. Thus, the correct answer is option A
