Virus Structure Components Quiz
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Questions and Answers

Which virus belongs to the Picornaviridae family?

  • Hepatitis A virus (correct)
  • Norovirus
  • Hepatitis B virus
  • Influenza virus
  • What is the transmission mode of Enterovirus/Hepatovirus?

  • Bloodborne
  • Sexual
  • Fecal-oral (correct)
  • Airborne
  • Which antibody is detected by competitive inhibition ELISA for Hepatitis A virus?

  • IgA anti – HAV
  • IgE anti – HAV
  • IgM anti – HAV
  • IgG anti – HAV (correct)
  • What is the incubation period range for Hepatitis B virus?

    <p>15 - 45 days</p> Signup and view all the answers

    Which hepatitis marker has no serological significance but is used for liver biopsy?

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

    Which hepatitis virus is characterized as having an enveloped morphology?

    <p>Hepatitis B virus</p> Signup and view all the answers

    What is the role of the nucleocapsid in a virus?

    <p>It is the genome of the virus.</p> Signup and view all the answers

    Which component of a virus is typically more susceptible to inactivation by high temperature and extreme pH?

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

    What is the function of the capsomere in a virus?

    <p>It is a subunit of the capsid.</p> Signup and view all the answers

    Why are enveloped viruses typically more variably shaped or pleomorphic?

    <p>Because of their phospholipid labile structure</p> Signup and view all the answers

    What is the defining feature of an icosahedral virus?

    <p>Geometric shape with 20 triangular sides</p> Signup and view all the answers

    What is the incubation period for Hepatitis E?

    <p>2-9 weeks</p> Signup and view all the answers

    Which hepatitis virus is associated with a morphology described as 'Naked, Icosahedral, Linear, ssRNA'?

    <p>Hepatitis E</p> Signup and view all the answers

    Which hepatitis virus transmission method includes fecal-oral route?

    <p>Hepatitis E</p> Signup and view all the answers

    What is the major cause of liver cirrhosis and alcoholic hepatitis?

    <p>Hepatitis C</p> Signup and view all the answers

    Which hepatitis virus has an incubation period of 30-50 days?

    <p>Hepatitis C</p> Signup and view all the answers

    Which hepatitis virus is associated with the Flaviviridae family and Parenteral or Sexual Intercourse transmission?

    <p>Hepatitis C</p> Signup and view all the answers

    What is the process by which the capsid of a virus is removed?

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

    Which type of specimen is preferred for nucleic acid assays according to the text?

    <p>Throat swabs</p> Signup and view all the answers

    What is the primary mode of transmission for droplet-spread viruses?

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

    Which receptor is associated with the Influenza Virus according to the text?

    <p>CD4</p> Signup and view all the answers

    Which family does the Respiratory Syncytial Virus (RSV) belong to?

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

    What is the morphology of Adenovirus based on the text?

    <p>Naked, dsDNA, icosahedral</p> Signup and view all the answers

    Which virus is known for attacking ciliated columnar epithelial cells according to the text?

    <p>Respiratory Syncytial Virus (RSV)</p> Signup and view all the answers

    What is the clinical presentation of Influenza C as mentioned in the text?

    <p>+Genome consists of 7 ssRNA segments lacking Neuraminidase gene</p> Signup and view all the answers

    What makes novel coronavirus unique among coronaviruses according to the text?

    <p>Emerged from Hong Kong in late 2002</p> Signup and view all the answers

    What receptors are associated with viruses that cause infection in the respiratory tract through invasion of the respiratory mucosa?

    <p>ICAM-1 and CD4</p> Signup and view all the answers

    What is the primary method for detecting coronavirus infections?

    <p>RT-PCR</p> Signup and view all the answers

    Which structural proteins distinguish different genera of the virus?

    <p>M protein and Nucleoprotein</p> Signup and view all the answers

    What causes most of the known animal coronaviruses to display a tropism for epithelial cells of the respiratory or gastrointestinal tract?

    <p>Species specificity</p> Signup and view all the answers

    Which antigen is responsible for fusion of the virus to the host cell?

    <p>F antigen</p> Signup and view all the answers

    What is the primary method for detecting group B rotaviruses?

    <p>RT-PCR</p> Signup and view all the answers

    Which type of ribonucleic acid is found in coronaviruses?

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

    What is the primary cause of loss of electrolytes in infants and children infected by rotavirus?

    <p>NSP4 viral enterotoxin</p> Signup and view all the answers

    Which type of virus is known for affecting mainly the upper respiratory tract in humans?

    <p>(Coronaviruses</p> Signup and view all the answers

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