AnswersAnatomy Physiology ADNAQuestion 18
18
AssignmentMultiple Choice

DNA

Question 18 • Anatomy & Physiology A

In DNA replication, what is the lagging strand?

Answer
A
the strand that does not assemble new nucleotides in a continuous fashion
B
the strand that assembles new nucleotides in a continuous fashion
C
the strand that unzips itself at the beginning of DNA replication
D
the strand that cannot participate in DNA replication

Explanation

DNA polymerase can add nucleotides only in one direction. Because the two DNA strands run in opposite directions, the lagging strand is built in short sections rather than continuously. Choice A describes this discontinuous assembly; choice B describes the leading strand.

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