Virus Shapes and Origins Quiz
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Questions and Answers

Who discovered transposons in 1950?

  • Rosalind Franklin
  • Barbara McClintock (correct)
  • Marie Curie
  • Gregor Mendel
  • What is the alternative name for the regressive hypothesis?

  • Escape hypothesis
  • Virus-first hypothesis
  • Coevolution hypothesis
  • Vagrancy hypothesis (correct)
  • Which of the following hypotheses proposes that viruses might have evolved simultaneously with cells on Earth?

  • Coevolution hypothesis
  • Virus-first hypothesis (correct)
  • Escape hypothesis
  • Regressive hypothesis
  • What do viroids interact with in host cells for their replication?

    <p>Nucleic acids</p> Signup and view all the answers

    Why did the escape hypothesis fail to explain the complex structures on virus particles?

    <p>It didn't consider host dependency</p> Signup and view all the answers

    Which hypothesis goes against the definition of viruses requiring host cells?

    <p>Virus-first hypothesis</p> Signup and view all the answers

    What characteristic does not make cellular parasites resemble viruses?

    <p>Simple structures</p> Signup and view all the answers

    What has led modern virologists to reconsider classical hypotheses?

    <p>Origins pre-dating life divergence</p> Signup and view all the answers

    What was the speculation that some viruses might have originated from complex molecules made of protein and nucleic acid?

    <p>Virus-first Hypothesis</p> Signup and view all the answers

    What is a common feature between satellites virus and viroids?

    <p>Interaction with host cells</p> Signup and view all the answers

    What hypothesis suggests that viruses may have evolved from complex molecules of protein and nucleic acid at the same time as cells appeared on Earth?

    <p>Coevolution hypothesis</p> Signup and view all the answers

    Why did the regressive hypothesis fail to explain why even the smallest cellular parasites do not resemble viruses?

    <p>It contradicted the definition of viruses requiring host cells</p> Signup and view all the answers

    What is a significant drawback of the escape hypothesis in explaining virus structures?

    <p>It cannot explain the complex capsids on virus particles</p> Signup and view all the answers

    Who discovered transposons in 1950?

    <p>Barbara McClintock</p> Signup and view all the answers

    According to modern understanding, what is a distinguishing feature of viruses' origins compared to cellular life?

    <p>Ancient origins predating cellular life</p> Signup and view all the answers

    Why do viroids not code for proteins but still interact with the host cell?

    <p>They use host machinery for replication</p> Signup and view all the answers

    Which hypothesis did not consider the presence of complex capsids and structures on virus particles?

    <p>Escape hypothesis</p> Signup and view all the answers

    'Satellites virus' may represent evolutionary intermediates between:

    <p>'Viroids' and 'viruses'</p> Signup and view all the answers

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