Genetic Material Testing and Bacteriophages Life Cycle
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Questions and Answers

What type of bond links nucleotides in a DNA strand?

  • Van der Waals bond
  • Covalent bond (correct)
  • Hydrogen bond
  • Ionic bond

    • In the Watson-Crick double helix model, what is the diameter of the DNA helix?

  • 20 Å (correct)
  • 30 Å
  • 40 Å
  • 10 Å

    • Who played a significant role in solving the X-ray diffraction pattern of DNA, leading to the Watson-Crick double helix model?

  • Linus Pauling
  • Gregor Mendel
  • Rosalind Franklin (correct)
  • Erwin Chargaff

    • What is the spacing between repeating units in the DNA helix according to the Watson-Crick model?

    <p>3.4 Å</p> Signup and view all the answers

    Which of the following nitrogenous bases is NOT found in DNA?

    <p>Uracil (U)</p> Signup and view all the answers

    What is the significance of the Watson and Crick Double Helix Model of DNA?

    <p>It explained the antiparallel polarity of DNA strands.</p> Signup and view all the answers

    Which statement best describes the DNA as per the Watson and Crick Double Helix Model?

    <p>It flows directly from its molecular structure.</p> Signup and view all the answers

    What did the blender experiments of Hershey and Chase reveal about DNA's function?

    <p>It demonstrated that DNA is the genetic material.</p> Signup and view all the answers

    Which component of a nucleotide is responsible for forming the backbone of the DNA double helix?

    <p>Phosphate group</p> Signup and view all the answers

    In the context of DNA structure, what do X-ray diffraction patterns reveal?

    <p>The antiparallel polarity of DNA strands.</p> Signup and view all the answers

    What did Avery and his colleagues demonstrate through bacterial transformation?

    <p>The genetic material was protein.</p> Signup and view all the answers

    What did the Hershey-Chase Waring blender experiment aim to confirm?

    <p>Whether protein or DNA is the genetic material</p> Signup and view all the answers

    In the Watson-Crick model of DNA structure, what does 'antiparallel polarity' refer to?

    <p>The directionality of the two DNA strands</p> Signup and view all the answers

    What was the key result of the phages labeled with radioactive DNA or protein experiment?

    <p>Most radioactive phosphorus was in the pellet with infected bacteria cells</p> Signup and view all the answers

    What are the two chemically distinct ends of a DNA polymer called?

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

    What do X-ray diffraction patterns help determine about DNA?

    <p>The secondary structure of DNA</p> Signup and view all the answers

    Which elements are part of a nucleotide in DNA?

    <p>Phosphate, nitrogenous bases, deoxyribose sugar</p> Signup and view all the answers

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