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O LevelBiologyCambridgeExam Questions12. Disease & Immunity12.3 Immunity

Immunity (Cambridge O Level Biology)

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12.3 Immunity

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12.3 Immunity

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1
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The immune system recognises which part of a pathogen?

  • Antibiotic

  • Antigen

  • Active site

  • Antibody

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2
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In many multicellular animals, pathogens are recognised as foreign and are attacked by the immune system.

Which of the following may be produced during an immune response?

  • Antigens

  • Antibiotics

  • Pathogens

  • Antibodies

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1
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HIV is an STI. The following statements are about changes that could occur in the body.

  1. Reduced antibody production
  2. Reduction in red blood cells
  3. Reduction in white blood cells
  4. Reduced volume of blood plasma

Which of these statements would be correct for HIV?

  • 1 and 2

  • 2 and 4

  • 3 and 4

  • 1 and 3

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21 mark

Which statement describes an example of active immunity?

  • Antibodies pass through the placenta from the blood of a mother to the blood of a fetus, giving the baby immunity to some diseases.

  • A person is given an injection of antibiotics to kill bacteria which are causing a disease.

  • A person is given an injection of antigens from pathogens that cause a disease and after this the body produces antibodies against these pathogens.

  • The clotting of blood prevents disease-causing bacteria entering the circulatory system. 

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1
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There are numerous ways in which a person can acquire antibodies, giving immunity to a disease. Some of these are:

  1. Vaccination
  2. Infection by disease
  3. A baby feeding on breast milk

Which of the options would give a person active immunity?

  • 1 and 2 only

  • 1, 2 and 3

  • 1 and 3 only

  • 2 and 3 only

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2
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Which row in the table below correctly describes the attributes of passive immunity?

  effective period antibodies made? involves production of memory cells?
A long term yes no
B long term yes yes
C short term no no
D short term no yes

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    3
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    What happens when a person is vaccinated against measles?

      type of immunity production of memory cells?
    A passive yes
    B passive no
    C active yes
    D active no

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      4
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      Passive and active immunity have which of the following features in common?

      1. They are always long-term.
      2. They always involve the activity of memory cells.
      3. They involve antibodies.
      4. They can be acquired by vaccination.

      • 1 and 2

      • 3 only

      • 2 and 3

      • 3 and 4

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