Replication forks from the same origin of replication extend from the beginning of the strand to the end where the enzyme helicase helps to move the replication fork unwinding DNA double helix structure by breaking the hydrogen bonds between the Nitrogenous bases.
DNA strand is used as template for the leading strand at one fork and for the lagging strand at the second fork. New DNA is synthesized from 5' to 3' on the leading strand.
The strand is made continuously forward in the direction of the replication fork while the other strand is made in 3' to 5' direction and been referred to as ozazaki fragments.
