May/June 2026 Paper 13

2026 · 40 questions · 40 parts · 40 marks

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39Antibodies VaccinationHard1 mark
Which statements about the defence in the body against infectious disease are correct? 1 In passive immunity, the plasma cells of a person produce antibodies but no memory cells against specific antigens. 2 A specific immune response involves activation of B-lymphocytes and T-lymphocytes following recognition of, and binding to, a specific antigen. 3 Following invasion by microorganisms, natural active immunity can be gained by initiating an immune response.