Distinguish between: Leading strand and Lagging strand.

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Leading Strand Lagging Strand
$(1)$ The leading strand is synthesized continuously in the $5' \rightarrow 3'$ direction. $(1)$ The lagging strand is synthesized discontinuously in the $5' \rightarrow 3'$ direction.
$(2)$ No Okazaki fragments are formed. $(2)$ Okazaki fragments are formed here.
$(3)$ $DNA$ polymerase adds new nucleotides towards the $3'$ end. Nucleotides are added one by one via phosphodiester bonds. $(3)$ $DNA$ polymerase cannot add nucleotides in the direction of strand growth, hence continuous synthesis does not occur.
$(4)$ $A$ single $RNA$ primer is required at the start. $(4)$ Multiple $RNA$ primers are required for each Okazaki fragment.

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