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

What is the main method of prevention for measles?

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

How does penicillin work as an antibiotic?

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

What do vaccines contain?

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

Where do mature T cells circulate as helpers or killers?

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

What is one reason for the success of eradicating smallpox?

<p>Infected people being hard to identify (D)</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 (A)</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 (B)</p> Signup and view all the answers

Why is herd immunity important in vaccination programs?

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

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

<p>Antigenic concealment (A)</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 (C)</p> Signup and view all the answers

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