What is the Y-shaped region on a replicating DNA molecule where new strands are growing?

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Multiple Choice

What is the Y-shaped region on a replicating DNA molecule where new strands are growing?

Explanation:
During DNA replication, unwinding of the double helix creates a Y-shaped region where the parental strands separate and new DNA is synthesized—the replication fork. It’s at this fork that nucleotides are added by DNA polymerases as they move along the templates, with the leading strand built continuously toward the fork and the lagging strand made in short fragments away from it. The other terms describe either the enzyme that unwinds DNA (helicase), an RNA segment that starts synthesis (RNA primer), or the starting site of replication on the molecule (origin of replication), none of which is the growing region itself.

During DNA replication, unwinding of the double helix creates a Y-shaped region where the parental strands separate and new DNA is synthesized—the replication fork. It’s at this fork that nucleotides are added by DNA polymerases as they move along the templates, with the leading strand built continuously toward the fork and the lagging strand made in short fragments away from it. The other terms describe either the enzyme that unwinds DNA (helicase), an RNA segment that starts synthesis (RNA primer), or the starting site of replication on the molecule (origin of replication), none of which is the growing region itself.

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