During DNA replication,one strand is formed c | vedclass

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(C) $DNA$ polymerase enzyme can only catalyze the polymerization of nucleotides in the $5'$ to $3'$ direction. Since the two strands of the $DNA$ doub

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$DNA$ chain formation takes place in $5'$ to $3'$ direction only

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(C) $DNA$ polymerase enzyme can only catalyze the polymerization of nucleotides in the $5'$ to $3'$ direction. Since the two strands of the $DNA$ double helix are antiparallel (one runs $3'$ to $5'$ and the other $5'$ to $3'$),the replication fork moves in one direction. On the template strand with $3'$ to $5'$ polarity,the new strand is synthesized continuously in the $5'$ to $3'$ direction (leading strand). On the template strand with $5'$ to $3'$ polarity,the new strand must be synthesized in short fragments (Okazaki fragments) in the $5'$ to $3'$ direction because the replication fork opens in the opposite direction relative to the synthesis requirement (lagging strand). Therefore,the constraint of $5'$ to $3'$ synthesis is the fundamental reason for discontinuous replication.

During $DNA$ replication,one strand is formed continuously and the second strand is formed discontinuously because:

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