Which statement about the rate and location of DNA replication is true?

Which statement about the rate and location of DNA replication is true?

• A. Replication occurs at a single site only.
• B. Replication does require enzymes.
• C. Replication cannot occur in chromosomes.
• D. Replication occurs simultaneously at many sites along the molecule, speeding up the process.

Answer: (D)

DNA replication is organized to copy the genome quickly by starting at multiple points. In eukaryotic chromosomes there are many origins of replication scattered along the DNA, and from each origin replication forks progress in both directions. This setup means copying the molecule happens at several sites at once, greatly speeding up the overall process. The activity of replication relies on enzymes like helicase, primase, DNA polymerase, ligase, and topoisomerase, and it occurs within chromosomes. So, replication occurring simultaneously at many sites along the molecule captures both the location and the rate advantage, making it the true description.

DNA replication is organized to copy the genome quickly by starting at multiple points. In eukaryotic chromosomes there are many origins of replication scattered along the DNA, and from each origin replication forks progress in both directions. This setup means copying the molecule happens at several sites at once, greatly speeding up the overall process. The activity of replication relies on enzymes like helicase, primase, DNA polymerase, ligase, and topoisomerase, and it occurs within chromosomes. So, replication occurring simultaneously at many sites along the molecule captures both the location and the rate advantage, making it the true description.