Trailing strand that is copied discontinuously because it is traveling away from helicase.
The two strands at the replication fork that act as templates for DNA replication are the leading strand and the lagging strand.
The strand of developing DNA that is produced in the same direction as the expanding replication fork is known as the leading strand. Leading strand synthesis happens continuously.
On the other hand, the lagging strand is the new DNA strand whose motion runs counter to that of the expanding replication fork. The lagging strand requires more work to replicate than the leading strand. It is created in a series of brief, independent fragments, which DNA ligase then connects to create a continuous DNA strand.
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