The DNA in the region of the arrow would support the formation of the lagging strand of DNA.
The lagging strand is synthesized in 5'→3' direction in the form of small fragments away from the replication fork whereas, the leading strand is synthesized towards the replication fork in 5'→3' direction in a continuous fashion.
The question is incomplete. The complete question is:-
This figure shows a replication bubble with two replication forks. The DNA in the region of the arrow would support the synthesis of _______ strand of DNA.
either the leading or the lagging,
the lagging,
the leading,
neither the leading or lagging.
To learn more about replication fork here
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