Semiconservative Model of DNA Replication
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Questions and Answers

Which strand is synthesized continuously during DNA replication?

  • Leading strand (correct)
  • Both strands are synthesized continuously
  • Neither strand is synthesized continuously
  • Lagging strand
  • What are the short fragments called that make up the lagging strand during DNA replication?

  • Okazaki fragments (correct)
  • Polymerase chains
  • Primers
  • Replication bubbles
  • What enzyme replaces the RNA nucleotides of the primer on the lagging strand with DNA nucleotides?

  • RNA polymerase
  • DNA polymerase I (correct)
  • DNA ligase
  • DNA polymerase III
  • Which enzyme joins the sugar-phosphate backbones of Okazaki fragments in DNA replication?

    <p>DNA ligase</p> Signup and view all the answers

    During DNA replication, in which direction can a new DNA strand elongate?

    <p>$5'\rightarrow3'$ direction</p> Signup and view all the answers

    What process significantly reduces the error rate during DNA replication?

    <p>Proofreading by DNA polymerases</p> Signup and view all the answers

    What is the main characteristic of the semiconservative model of DNA replication?

    <p>It involves one old DNA strand and one new DNA strand in the replicated double helix</p> Signup and view all the answers

    What is the role of helicases in DNA replication?

    <p>Untwisting the double helix</p> Signup and view all the answers

    Which enzyme synthesizes RNA primers in DNA replication?

    <p>Primase</p> Signup and view all the answers

    What is the direction of elongation for the new DNA strand during replication?

    <p>5' to 3'</p> Signup and view all the answers

    How do DNA polymerases add nucleotides to the growing DNA strand?

    <p>Through condensation reactions</p> Signup and view all the answers

    What drives the polymerization reaction catalyzed by DNA polymerase during DNA replication?

    <p>Release of pyrophosphate</p> Signup and view all the answers

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