MEDBIO 5: General Properties of Viruses Microbiology
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the term for the smallest infectious agent that contains only one kind of nucleic acid?

  • Bacteriophage
  • Viroid
  • Prion
  • Virus (correct)

What is the purpose of the coat proteins in a virus?

  • To facilitate the replication of the viral genome
  • To assemble to form the capsid and encase the viral nucleic acid (correct)
  • To recognize and bind to specific host cells
  • To transcribe the viral genome into messenger RNA

What is the term for the entire infectious unit of a virus?

  • Nucleocapsid
  • Virion (correct)
  • Viral genome
  • Capsid

What is the size of the RNA genome in Astroviridae?

<p>6.8–7.0 kb (B)</p> Signup and view all the answers

What is the function of the lipid-containing membrane in a virus?

<p>To facilitate the attachment and penetration of the virus into the host cell (C)</p> Signup and view all the answers

What is the term for the protein-nucleic acid complex that represents the packaged form of the viral genome?

<p>Nucleocapsid (A)</p> Signup and view all the answers

Which family of viruses has a linear, double-stranded, segmented RNA genome?

<p>Reoviridae (D)</p> Signup and view all the answers

What is the characteristic surface feature of Astroviridae particles?

<p>Star-shaped outline (B)</p> Signup and view all the answers

What is the size range of viruses in diameter?

<p>20-300 nm (A)</p> Signup and view all the answers

Which virus family lacks a genome linked protein (VPg)?

<p>Hepeviridae (A)</p> Signup and view all the answers

What is a characteristic of diploid cell lines?

<p>They retain their normal chromosome pattern (D)</p> Signup and view all the answers

What is the size of the particles in Picobirnaviridae?

<p>35–40 nm (A)</p> Signup and view all the answers

Which virus family is associated with gastroenteritis in humans and Colorado tick fever in animals?

<p>Reoviridae (D)</p> Signup and view all the answers

Which of the following is not a cytopathic effect of virus infection?

<p>Hemagglutination (D)</p> Signup and view all the answers

What is the purpose of hemadsorption?

<p>To detect virus-encoded proteins (C)</p> Signup and view all the answers

What type of virus causes focal areas of swollen, rounded cells in monolayers of cultured cells?

<p>Herpesvirus (A)</p> Signup and view all the answers

Which of the following is a method of detecting virus-specific nucleic acid?

<p>Polymerase chain reaction (B)</p> Signup and view all the answers

What type of cell line is derived from diploid or malignant tissues and can grow indefinitely?

<p>Continuous cell line (B)</p> Signup and view all the answers

What is the primary function of receptor molecules on the cell's surface?

<p>To determine cell tropism and viral pathogenesis (B)</p> Signup and view all the answers

What occurs shortly after penetration in the viral replication cycle?

<p>Uncoating (D)</p> Signup and view all the answers

What is unique about negative-strand viruses?

<p>They lack enzymes for mRNA synthesis (C)</p> Signup and view all the answers

What is the result of the morphogenesis step in the viral replication cycle?

<p>Progeny virus formation (D)</p> Signup and view all the answers

What is the purpose of the attachment step in the viral replication cycle?

<p>To bind to specific receptor sites (B)</p> Signup and view all the answers

What is a characteristic of the synthesis of viral components?

<p>It occurs in a highly organized sequence (C)</p> Signup and view all the answers

What is a major concern regarding the use of animal organs as xenografts in humans?

<p>The potential introduction of new viral pathogens (B)</p> Signup and view all the answers

What is a characteristic of bioterrorism agents?

<p>They can be genetically modified to increase virulence (D)</p> Signup and view all the answers

Which of the following is NOT an example of a viral agent that could be used for bioterrorism?

<p>Hepatitis (D)</p> Signup and view all the answers

What is a public health measure that can contribute to the emergence of new viral strains?

<p>Curtailment of prevention programs (D)</p> Signup and view all the answers

Which of the following is an example of a bacterial agent that could be used for bioterrorism?

<p>Anthrax (C)</p> Signup and view all the answers

What is a risk category of bioterrorism agents?

<p>Viral agents like smallpox and hemorrhagic fevers (A)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Browser