Molecular Structure of DNA: Nucleotides and Bonds
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Questions and Answers

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

  • Detects and repairs DNA damage
  • Cuts and rejoins the helix to prevent tangling
  • Adds nucleotides to the freshly built DNA strand
  • Removes the RNA primer and replaces it with DNA (correct)

    • What is a characteristic of euchromatin?

  • Contains histones bunched in groups called nucleosomes
  • Extremely tight genetic material with inactive genes
  • Synthesized continuously in the leading strand
  • Extremely loose genetic material (correct)

    • What enzyme is responsible for unwinding the double helix in DNA replication?

  • DNA polymerase I
  • Topoisomerase
  • RNA primase
  • Helicase (correct)

    • What do telomeres refer to in the context of DNA replication?

    <p>Bits of unimportant/less important DNA at the ends of molecules</p> Signup and view all the answers

    How is the semi-conservative model of DNA replication supported?

    <p>By observing the weights of replicated DNA after using N15 template DNA</p> Signup and view all the answers

    In what form is genetic material packaged in heterochromatin?

    <p>Extremely tight genetic material</p> Signup and view all the answers

    What type of sugar is found in a nucleotide of DNA?

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

    Which of the following bases are purines in DNA?

    <p>Adenine and Guanine</p> Signup and view all the answers

    How do purines and pyrimidines pair in DNA?

    <p>Purines with Pyrimidines</p> Signup and view all the answers

    What technique did Rosalind Franklin use in discovering the double helix structure of DNA?

    <p>X-ray crystallography</p> Signup and view all the answers

    In DNA, where does the 5' end get its name from?

    <p>Presence of a phosphate group</p> Signup and view all the answers

    How are complementary strands oriented in DNA?

    <p><em>Antiparallel to each other</em></p> Signup and view all the answers

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