AS-Level Biology: Measles Pathogen and Transmission
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Questions and Answers

What type of pathogen causes measles?

  • Virus (correct)
  • Bacteria
  • Fungus
  • Parasite
  • Which of the following is a method of transmission for measles?

  • Body fluids
  • Airborne droplets (correct)
  • Sexual contact
  • Foodborne
  • What is the incubation period for measles?

  • 2-5 days
  • 8-14 days (correct)
  • 15-20 days
  • 30-40 days
  • Which of the following are clinical features of measles?

    <p>Rashes and fever</p> Signup and view all the answers

    What is the main method of prevention for measles?

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

    How does penicillin work as an antibiotic?

    <p>Interferes with cell wall synthesis in bacteria</p> Signup and view all the answers

    How do T-lymphocytes contribute to the immune response?

    <p>By coating bacteria, making it easier for phagocytes to ingest them</p> Signup and view all the answers

    Which type of immunity is gained by being infected or receiving antibodies from breast milk?

    <p>Natural immunity</p> Signup and view all the answers

    What do vaccines contain?

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

    Which cells divide into memory cells or secrete cytokines that stimulate B cells to divide?

    <p>Helper T cells</p> Signup and view all the answers

    What is the mode of action of killer T cells?

    <p>Secreting toxic substances to kill body cells</p> Signup and view all the answers

    Where do mature T cells circulate as helpers or killers?

    <p>In the thymus</p> Signup and view all the answers

    What is one reason for the success of eradicating smallpox?

    <p>Infected people being hard to identify</p> Signup and view all the answers

    What is the main method by which monoclonal antibodies (MABS) are produced?

    <p>Fusing plasma cells harvested from a mouse with cancer cells</p> Signup and view all the answers

    What is a characteristic of vaccines that made them easy to administer during the smallpox eradication?

    <p>Vaccine being freeze-dried and heat-stable</p> Signup and view all the answers

    Why is herd immunity important in vaccination programs?

    <p>To interrupt transmission of diseases within a population</p> Signup and view all the answers

    Which process involves pathogens hiding in body cells or host proteins?

    <p>Antigenic concealment</p> Signup and view all the answers

    What is the role of teens in the success of eradicating smallpox?

    <p>Teens were enthusiastic vaccinators and suppliers of information</p> Signup and view all the answers

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