DNA Replication Quiz
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Questions and Answers

What is the role of DNA polymerase in replication?

  • It replicates DNA (correct)
  • It synthesizes a short stretch of RNA
  • It initiates replication
  • It synthesizes a RNA primer
  • What is the function of Primase in replication?

  • It synthesizes a RNA primer (correct)
  • It proofreads DNA
  • It replicates DNA
  • It initiates replication
  • What is the length of the RNA primer synthesized by Primase?

  • 20 nts long
  • 10 nts long (correct)
  • 40 nts long
  • 30 nts long
  • Why is RNA polymerase used to synthesize a RNA primer?

    <p>It can synthesize RNA without a primer sequence</p> Signup and view all the answers

    What is the role of the RNA primer in DNA replication?

    <p>It is used as a template for DNA synthesis</p> Signup and view all the answers

    What happens to the RNA primer after DNA replication is complete?

    <p>It is degraded by enzymes</p> Signup and view all the answers

    What is the difference between DNA polymerase and RNA polymerase?

    <p>DNA polymerase requires a primer sequence, while RNA polymerase does not</p> Signup and view all the answers

    What is the function of nucleotides in DNA replication?

    <p>They serve as the building blocks for DNA synthesis</p> Signup and view all the answers

    What is the function of DNA polymerase in the replication process?

    <p>It replicates DNA</p> Signup and view all the answers

    What is the role of Primase in DNA replication?

    <p>It synthesizes a RNA primer</p> Signup and view all the answers

    Study Notes

    DNA Replication enzymes and their roles

    • DNA Polymerase: Responsible for synthesizing new DNA strands by adding nucleotides to a template strand during DNA replication.

    Primase and RNA Primer

    • Primase: An enzyme that synthesizes short RNA primers, which are complementary to the template DNA strand, providing a starting point for DNA synthesis.
    • Length of RNA primer: Typically 10-12 nucleotides long.
    • RNA primer function: The RNA primer provides a 3' hydroxyl group for DNA synthesis to initiate, and acts as a starting point for DNA polymerase to begin synthesizing new DNA.

    RNA Polymerase vs. DNA Polymerase

    • RNA polymerase: Not used to synthesize RNA primers in DNA replication; instead, Primase is responsible for this.
    • Difference between DNA polymerase and RNA polymerase: RNA polymerase is used for transcription, synthesizing RNA from a DNA template, whereas DNA polymerase is used for DNA replication, synthesizing new DNA strands from a template strand.

    Nucleotides and DNA Replication

    • Nucleotides function: Building blocks of DNA, providing the raw material for DNA synthesis during replication.

    Post-Replication

    • RNA primer removal: After DNA replication is complete, the RNA primer is removed and replaced with DNA nucleotides, ensuring a continuous DNA strand.

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    Description

    Test your knowledge on DNA replication with this quiz! Learn about the important role of RNA primers in initiating replication and why RNA polymerase is used to synthesize them. Challenge yourself with questions on nucleotides, Primase, and the process of synthesizing complementary RNA. Perfect for biology students or anyone interested in the fascinating world of genetics!

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