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Immunity and disease
Written by Dr. Hira Salman (Biology)
8 Class 12 Biology questions with answers and explanations.
Printable worksheet with answer key
All questions with answers
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Antibodies are made by:
- 1 Platelets
- 2 Neurons
- 3 Red blood cells
- 4 B lymphocytes
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Correct answer: B lymphocytes
B cells produce antibodies after meeting an antigen.
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Vaccination gives:
- 1 Temporary relief only
- 2 Active immunity
- 3 No immunity
- 4 Passive immunity only
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Correct answer: Active immunity
The body makes its own antibodies and memory cells.
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Mosquitoes spread:
- 1 Tuberculosis
- 2 Malaria
- 3 Cholera
- 4 Measles
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Correct answer: Malaria
The Anopheles mosquito carries malaria.
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AIDS is caused by:
- 1 A protozoan
- 2 A fungus
- 3 HIV
- 4 A bacterium
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Correct answer: HIV
The virus damages helper T cells.
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Tuberculosis is caused by:
- 1 A virus
- 2 A protozoan
- 3 A bacterium
- 4 A fungus
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Correct answer: A bacterium
Mycobacterium tuberculosis causes TB.
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The first line of defence of the body against pathogens is the:
- 1 Antibodies
- 2 Skin
- 3 Vaccines
- 4 Memory cells
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Correct answer: Skin
Skin is a physical barrier.
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A substance that triggers an immune response is an:
- 1 Antibody
- 2 Enzyme
- 3 Hormone
- 4 Antigen
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Correct answer: Antigen
Antigens are recognised as foreign.
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Passive immunity can be gained from:
- 1 A vaccine
- 2 Exercise
- 3 Having the disease
- 4 Mother's milk
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Correct answer: Mother's milk
Antibodies are passed from the mother.
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