Question

During replication of DNA, Okazaki fragments are formed in the direction of

• A. 3 $\to$ 5
• B. 5 $\to$ 3
• C. 5 $\to$ 5
• D. 3 $\to$ 3

Answer 1

Answer: (B)

Okazaki et al, (1968) suggested that during DNA replication only one strand shows a continuous replication (leading strand), while other strand (lagging strand) replicates in a discontinuous manner, .i.e., synthesizes short fragments called Okazaki fragments. Both the strands synthesize new strand in 5 $\to$ 3 direction (of new strand).