DNA is replicated during the S phase of the cell cycle.
Question
DNA is replicated during the S phase of the cell cycle.
Solution
Yes, that's correct. DNA replication occurs during the S phase (synthesis phase) of the cell cycle. Here's a step-by-step breakdown of the process:
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Initiation: The DNA double helix unwinds and separates into two single strands. This is facilitated by an enzyme called helicase. The point where the DNA separates is called the replication fork.
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Elongation: New DNA strands are synthesized by an enzyme called DNA polymerase. It adds nucleotides to the 3' end of the new DNA strand, using the original strand as a template.
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Termination: Once the entire DNA molecule has been replicated, the process is terminated. The two new DNA molecules each contain one original and one newly synthesized strand.
This process ensures that each new cell has an exact copy of the DNA.
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