Unit 3: Interaction and Interdependence
Topic 3.7: Defence Against Disease Questions
Practice 20 exam-style questions for IB Biology Topic 3.7. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Identify1 mark
After an infection clears, which cells remain in the body to give a faster response if the same pathogen returns?
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State the type of cell that HIV infects and destroys.
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Which primary defence is a CHEMICAL barrier rather than a physical one?
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A vaccine protects a person from a disease without making them ill.
What does a vaccine contain?
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A list contains a macrophage, a B-cell, a helper T-cell and a memory cell.
Which one belongs to the innate immune system?
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Which three features best describe the innate immune response?
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What is the main function of a helper T-cell during the adaptive immune response?
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Why are antibiotics effective against many infectious diseases?
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What does the abbreviation AIDS describe?
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Which type of cell is infected and destroyed by HIV?
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State the type of leucocyte (white blood cell) that carries out the innate immune response.
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A patient is admitted to hospital with a gut infection that produces a toxin.
State the main symptom that would lead to this hospital admission.
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Which of these defences provides SPECIFIC (adaptive) immunity to a disease?
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State the event that triggers the production of antibodies during an infection.
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State what must happen to a blood vessel before a clot will begin to form.
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State what is meant by the term zoonosis.
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What causes a blood clot to begin forming?
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Which term describes an organism or particle that causes an infectious disease?
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Rabies, some forms of tuberculosis and Japanese encephalitis are often grouped together.
What do these diseases share?
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What is the role of platelets in the formation of a blood clot?
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