An Introduction to Viruses: Discovery and Characteristics
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Questions and Answers

What did Louis Pasteur postulate about rabies in 1884?

  • It had no microbial cause
  • It was caused by bacteria
  • It was not infectious
  • It was caused by a virus (correct)
  • Who showed that a disease in tobacco was caused by a virus in the 1890s?

  • Louis Pasteur
  • Ivanovski and Beijerinck (correct)
  • Louis Pasteur and Ivanovski
  • Beijerinck and Louis Pasteur
  • Which statement best describes the characteristics of viruses?

  • Viruses have no definite size or shape
  • Viruses are larger than bacteria
  • Viruses are noncellular particles with definite size, shape, and chemical composition (correct)
  • Viruses are multicellular organisms
  • What is true about the origin of viruses based on the text?

    <p>Viruses are considered the most abundant microbes on earth</p> Signup and view all the answers

    Which term best describes viruses that are dependent on host cells for replication?

    <p>Obligate intracellular parasites</p> Signup and view all the answers

    In what way did virology evolve in the 1950s?

    <p>It became a multifaceted discipline studying noncellular particles</p> Signup and view all the answers

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