Discussion
During replication, Okazaki fragments elongate
Answer: D
Correct answer: lagging strand away from the replication fork
DNA polymerase can only add nucleotides to a 3’ end, so it works 5’→3’. On the lagging strand that direction is opposite to the way the fork is moving, so each Okazaki fragment is begun near the fork and extended away from it, until it meets the fragment made before. The leading strand, by contrast, is made continuously towards the fork.
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