Question

what is true about the lagging strand during dna replication?

a. it has the same sequence as the leading strand.

b. it contains okazaki fragments.

c. it is synthesized in the 5 to 3 direction.

d. it is synthesized before the leading strand.

Explanation:

• Option A: The lagging strand is complementary (not identical) to the leading strand, so this is false.
• Option B: The lagging strand is synthesized discontinuously in short segments called Okazaki fragments, which is a defining feature.
• Option C: Both leading and lagging strands are synthesized 5' to 3', so this is not unique to the lagging strand and does not answer what is specifically true about it.
• Option D: Leading and lagging strands are synthesized simultaneously during DNA replication, so this is false.

Answer:

B. It contains Okazaki fragments.