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DNA Replication Quiz
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DNA Replication Quiz

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Questions and Answers

Which enzyme is responsible for the release of DnaB at the forks during DNA replication?

  • Primase DnaG
  • DNA polymerase I
  • DNA gyrase
  • DnaC (correct)
  • What is the role of DNA polymerase I in E. coli DNA replication?

  • Unwinding the DNA double helix
  • Creating Okazaki fragments
  • Removing RNA primers and replacing them with DNA (correct)
  • Initiating DNA synthesis
  • What is the function of DNA gyrase during DNA replication?

  • Initiating DNA synthesis
  • Creating Okazaki fragments
  • Relaxing supercoiled DNA (correct)
  • Releasing DNA polymerase III
  • What is the function of DnaA during DNA replication?

    <p>Melting of DNA</p> Signup and view all the answers

    What is the significance of the Meselson and Stahl experiment in understanding DNA replication?

    <p>Demonstrated the semiconservative nature of DNA replication</p> Signup and view all the answers

    Study Notes

    DNA Replication Enzymes

    • Helicase is responsible for the release of DnaB at the replication forks during DNA replication.

    DNA Polymerase I

    • In E. coli DNA replication, DNA polymerase I is responsible for repairing RNA primers and filling in gaps left by RNAse H.

    DNA Gyrase

    • DNA gyrase is an enzyme that relaxes positive supercoils in DNA, allowing replication to proceed.

    DnaA Protein

    • DnaA is a protein that binds to the origin of replication, unwinding the DNA and allowing helicase to bind, initiating DNA replication.

    Meselson and Stahl Experiment

    • The Meselson and Stahl experiment demonstrated semi-conservative DNA replication, showing that each new DNA molecule contains one old strand (template) and one new strand synthesized during replication.

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    Description

    Test your knowledge of DNA replication with this quiz. Explore concepts such as semi-conservative replication, bidirectional replication, and the synthesis of new strands in the 5’→3’ direction.

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