The Virus Life Cycle Quiz
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Questions and Answers

Which step in the virus life cycle involves the fusion of viral and cellular membranes?

  • Attachment
  • Synthesis
  • Release
  • Uncoating (correct)

    • What happens to the negative sense RNA genome after it is released into the cell cytoplasm?

  • It is transcribed into mRNAs (correct)
  • It is replicated into a positive sense viral complementary RNA
  • It is translated into viral gene transcripts
  • It is encapsidated with the M protein

    • Which viral protein is responsible for interacting with the encapsidated genomes during assembly?

  • RNA dependent RNA polymerase
  • Host cell machinery
  • Glycoproteins
  • M protein (correct)

    • Which family does the Measles Virus (MeV) belong to?

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

    What is the function of the viral glycoproteins during the virus life cycle?

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

    Which step in the virus life cycle involves the production of a positive sense viral complementary RNA (vcRNA +ve)?

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

    What is the role of the host cell machinery during the virus life cycle?

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

    Which step in the virus life cycle involves the attachment of a virion to a host cell surface receptor?

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

    What is the function of the RNA dependent RNA polymerase in a -ssRNA virus?

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

    What is the first step in the virus life cycle?

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

    Which route of transmission involves the movement of a virus through the respiratory system?

    <p>Respiratory route</p> Signup and view all the answers

    Which type of transmission occurs when a virus is passed from a mother to her child during pregnancy or childbirth?

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

    Which term describes a virus's ability to infect a specific type of cell but not another?

    <p>Cellular tropism</p> Signup and view all the answers

    Which term describes a virus's ability to infect a specific tissue or organ?

    <p>Tissue tropism</p> Signup and view all the answers

    Which term describes a virus's ability to infect one host species but not another?

    <p>Host tropism</p> Signup and view all the answers

    Which site is considered a secondary site for viral entry and propagation within the body systems?

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

    Which step in the cycle of infection involves the replication of the virus at the primary site?

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

    Which step in the cycle of infection involves the release of viral particles from the host to infect others?

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

    Which route of transmission involves the spread of microbes from the human or animal stool to your mouth?

    <p>Fecal-oral route</p> Signup and view all the answers

    Which route of transmission is the most effective in spreading pathogens over long distances?

    <p>Respiratory route</p> Signup and view all the answers

    Which route of transmission involves the spread of pathogenic agents from animal-to-animal through coitus?

    <p>Venereal route</p> Signup and view all the answers

    Which route of transmission involves the direct application of a drug to the skin?

    <p>Cutaneous route</p> Signup and view all the answers

    Which route of transmission is associated with the spread of viruses like SARS and Ebola over short distances?

    <p>Respiratory route</p> Signup and view all the answers

    Which type of transmission is linked to premature births and miscarriages when it comes to HPV?

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

    Which type of transmission involves the spread of infectious diseases from animals to humans through ticks, mosquitoes, and fleas?

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

    Which route of transmission is commonly associated with tropical arthropods like arboviruses?

    <p>Mechanical route</p> Signup and view all the answers

    Which route of transmission is commonly associated with viruses like HIV-1, HBV, and papillomavirus?

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

    Which route of transmission is commonly associated with viruses like Lassa fever virus and cytomegalovirus?

    <p>Via urine</p> Signup and view all the answers

    Which type of epidemic does not necessarily have to involve contagious diseases?

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

    Which term describes a disease that is consistently present but limited to particular regions?

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

    Which term describes a disease that covers a wide area, affecting several countries and populations?

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

    Which type of transmission is commonly associated with ticks, mosquitoes, and fleas spreading infectious diseases from animals to humans?

    <p>Vector-borne transmission</p> Signup and view all the answers

    Which term describes the severity of disease caused by different strains of the same virus?

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

    What are virulence factors?

    <p>Characteristics that allow viruses to be pathogenic</p> Signup and view all the answers

    Which type of infection causes viruses to only replicate at the primary site?

    <p>Localised infection</p> Signup and view all the answers

    Which type of infection causes viruses to replicate at more distant tissues?

    <p>Generalised infection</p> Signup and view all the answers

    What determines the disease outcome of viral infection?

    <p>Viral replication in the host cells</p> Signup and view all the answers

    What does understanding the mechanisms involved during viral infection contribute to?

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

    What is the term for a virus's ability to infect a specific tissue or organ?

    <p>Viral tropism</p> Signup and view all the answers

    What is the role of the host cell machinery during the virus life cycle?

    <p>To support viral replication</p> Signup and view all the answers

    Which route of transmission is commonly associated with the spread of rhinovirus and influenza virus?

    <p>Respiratory route</p> Signup and view all the answers

    Which route of transmission is commonly associated with the spread of poliovirus?

    <p>Faecal-oral route</p> Signup and view all the answers

    Which route of transmission is commonly associated with the spread of Lassa fever virus and cytomegalovirus?

    <p>Via urine</p> Signup and view all the answers

    Which route of transmission is common with tropical arthropods and is associated with arboviruses?

    <p>Mechanical route</p> Signup and view all the answers

    Which type of epidemic is characterized by an unexpected increase in the number of disease cases in a specific geographical area, even if the disease is not necessarily contagious?

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

    Which term describes the characteristics that allow a virus to be pathogenic?

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

    What is the difference between pathogenicity and virulence?

    <p>Pathogenicity refers to the virus' effect on the host, while virulence refers to the severity of disease caused by different strains of the same virus</p> Signup and view all the answers

    What are virulence factors?

    <p>Characteristics that allow viruses to be pathogenic</p> Signup and view all the answers

    Which term describes a virus's ability to infect one host species but not another?

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

    What is the role of the host cell machinery during the virus life cycle?

    <p>To produce viral proteins</p> Signup and view all the answers

    What are virulence factors?

    <p>Factors that allow a virus to be pathogenic</p> Signup and view all the answers

    Which type of transmission is linked to premature births and miscarriages when it comes to HPV?

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

    Which term describes a virus's ability to infect a specific type of cell but not another?

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

    What does understanding the mechanisms involved during viral infection contribute to?

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

    Which route of transmission is commonly associated with viruses like HIV-1, HBV, and papillomavirus?

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

    Which route of transmission involves the movement of a virus through the respiratory system?

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

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