13
AssignmentMultiple Choice

DNA

Question 13 • Anatomy & Physiology A

In DNA replication, what is the leading strand?

Answer
A
the strand that is unzipped at the replication fork
B
the strand that assembles new nucleotides in a continuous fashion
C
the strand that does not assemble new nucleotides in a continuous fashion
D
the strand that waits for the DNA replication process to be finished

Explanation

DNA polymerase builds the leading strand continuously as the replication fork opens, adding nucleotides in the direction the fork is moving. The lagging strand, by contrast, is made discontinuously in short fragments, so choice C describes the lagging strand rather than the leading strand.

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