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Virus Taxonomy and Baltimore Classification Quiz
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Virus Taxonomy and Baltimore Classification Quiz

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Questions and Answers

What is the primary factor used in the Baltimore classification system to categorize viruses?

  • Dimensions of the virion and capsid
  • Nature of the nucleic acid (correct)
  • Symmetry of the capsid
  • Presence or absence of an envelope
  • Which component of a virus is responsible for anchoring glycoproteins and plays a role in host cell recognition?

  • Nucleic acid
  • Capsid
  • Nucleocapsid
  • Envelope (correct)
  • What is the structural unit of a capsid that comprises one or multiple protein subunits?

  • Envelope
  • Nucleocapsid
  • Virion
  • Protomers (correct)
  • In viral taxonomy, which characteristic helps differentiate viruses based on the genetic material they contain?

    <p>Nature of the nucleic acid</p> Signup and view all the answers

    Which type of virus has an outer layer composed of a phospholipid bilayer derived from the host cell?

    <p>Human immunodeficiency virus</p> Signup and view all the answers

    What is the function of the nucleocapsid in a virus structure?

    <p>Protect the nucleic acid</p> Signup and view all the answers

    Which characteristic aids in distinguishing enveloped viruses from non-enveloped viruses?

    <p>Presence or absence of an envelope</p> Signup and view all the answers

    Which of the following viruses has a positive-sense, single-stranded RNA genome?

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

    What is the capsid structure of the Adenovirus?

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

    Which of the following viruses has a negative-sense, single-stranded RNA genome?

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

    Which of the following viruses is classified as a double-stranded DNA virus?

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

    Which of the following viruses has an enveloped structure?

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

    Which of the following viruses is classified as a reverse transcribing virus?

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

    Which of the following viruses is classified as a single-stranded DNA virus?

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

    Which of the following viral families has an icosahedral capsid structure?

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

    What type of nucleic acid is found in HIV (human immunodeficiency virus)?

    <p>Single-stranded RNA</p> Signup and view all the answers

    What is the taxonomic classification of the virus that causes monkeypox (mpox)?

    <p>Family Poxviridae, genus Orthopoxvirus</p> Signup and view all the answers

    Which of the following viral families has a helical capsid structure?

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

    According to the Baltimore classification, which group includes viruses with single-stranded, negative-sense RNA genomes and helical capsids?

    <p>Group V</p> Signup and view all the answers

    Which of the following is a characteristic of an icosahedral capsid?

    <p>It is composed of 20 equilateral triangular faces.</p> Signup and view all the answers

    What is the primary source of the viral envelope in enveloped viruses?

    <p>The host cell's plasma membrane</p> Signup and view all the answers

    Which of the following is a characteristic of the Rhabdoviridae family?

    <p>They have a single-stranded, negative-sense RNA genome and a helical capsid.</p> Signup and view all the answers

    Which of the following viral genomes is composed of double-stranded DNA?

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

    According to the taxonomic classification system, which level corresponds to the suffix '-virus'?

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

    Which of the following statements about viral capsids is true?

    <p>Icosahedral capsids are formed by the aggregation of capsomeres.</p> Signup and view all the answers

    What is the primary function of the viral envelope?

    <p>To facilitate the entry of the virus into host cells.</p> Signup and view all the answers

    Which of the following statements about viral genomes is true?

    <p>Positive-sense RNA genomes can be directly translated by host ribosomes.</p> Signup and view all the answers

    Which of the following viral families is characterized by having a helical capsid and a single-stranded, negative-sense RNA genome?

    <p>All of the above</p> Signup and view all the answers

    Which of the following is NOT a route of viral transmission mentioned in the text?

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

    What does 'vertical transmission' refer to in the context of viral transmission?

    <p>Transmission from mother to offspring during or around birth</p> Signup and view all the answers

    Which of the following is NOT an example of vertical transmission mentioned in the text?

    <p>Transmission through skin lesions</p> Signup and view all the answers

    What is a 'reservoir host' in the context of cross-species transmission?

    <p>A host population in which a viral population is maintained</p> Signup and view all the answers

    Which of the following statements about spillover hosts is NOT true according to the text?

    <p>The host population can maintain the viral population</p> Signup and view all the answers

    What is the first stage in the five evolutionary stages of cross-species transmission described by Wolfe et al. (2007)?

    <p>The virus is present in a reservoir host population</p> Signup and view all the answers

    Which of the following statements about reservoir hosts is true according to the text?

    <p>Viruses can still be highly virulent to and even kill reservoir hosts</p> Signup and view all the answers

    Which of the following is NOT a potential route of entry for viruses mentioned in the text?

    <p>None</p> Signup and view all the answers

    Which of the following statements about the viral infection cycle is true?

    <p>Viral assembly and release from the host cell is the final step in the infection cycle</p> Signup and view all the answers

    Which of the following is NOT a potential consequence of cross-species transmission mentioned in the text?

    <p>Complete eradication of the virus from all host populations</p> Signup and view all the answers

    Which of the following is NOT a common route of viral transmission?

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

    Which of the following is an example of vertical transmission of a virus?

    <p>Transmission of Zika virus from mother to fetus</p> Signup and view all the answers

    Which characteristic is used to differentiate viruses based on the symmetry of the capsid?

    <p>Dimensions of the virion and capsid</p> Signup and view all the answers

    In viral taxonomy, what is the primary factor used to differentiate viruses based on their genetic material?

    <p>Nature of the nucleic acid</p> Signup and view all the answers

    Which of the following is a route of viral entry into the host?

    <p>All of the above</p> Signup and view all the answers

    Which of the following best describes the viral infection cycle?

    <p>Entry into host, replication, assembly, release</p> Signup and view all the answers

    Which viral characteristic plays a significant role in cross-species transmission?

    <p>Nature of the nucleic acid</p> Signup and view all the answers

    Which of the following is NOT a potential route of viral shedding from the host?

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

    What is the primary route of transmission for Human Immunodeficiency Virus (HIV)?

    <p>Sexual transmission</p> Signup and view all the answers

    Which of the following is an example of cross-species transmission of a virus?

    <p>Transmission of Zika virus from mosquitoes to humans</p> Signup and view all the answers

    Which of the following viruses is most likely to spread through direct contact between hosts?

    <p>Ebola virus</p> Signup and view all the answers

    Which of the following is a potential route of hematogenous spread of a virus within the host?

    <p>Through the bloodstream</p> Signup and view all the answers

    What role do glycoproteins play in the spread of viruses within a host?

    <p>Anchoring the viral envelope</p> Signup and view all the answers

    Which of the following is an example of neural spread of a virus within the host?

    <p>Spread of rabies virus through the nervous system</p> Signup and view all the answers

    Which of the following is a potential route of sexual transmission of a virus?

    <p>Exchange of bodily fluids during sexual activity</p> Signup and view all the answers

    Which of the following is a potential route of vector-borne transmission of a virus?

    <p>Transmission by an insect vector, such as a mosquito</p> Signup and view all the answers

    Which type of symmetry is associated with helical nucleocapsids in animal viruses?

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

    In viral taxonomy, what differentiates viruses based on the genetic material they contain?

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

    Which type of RNA genome does the rabies virus possess?

    <p>Negative sense (-)</p> Signup and view all the answers

    What is the symmetry associated with capsid structure composed of hexons and pentons?

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

    Which parameter helps classify viruses by whether they are enveloped or non-enveloped?

    <p>Genome architecture</p> Signup and view all the answers

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