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A-LevelBiologyImmunity9700/12 · Feb/Mar 2018 · Q401 Mark

A vaccine is used to create artificial active immunity. After being given a vaccine, it will take a period of time before a person develops long-term immunity against the disease. Which statement about this period of time explains this delay?

ANo memory cells have been produced from B-lymphocytes.

BNo plasma cells have been produced from B-lymphocytes.

CThe primary immune response has not produced enough antibodies.

DThe secondary immune response has not produced enough antibodies.

✓ Correct answer

A: No memory cells have been produced from B-lymphocytes.

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About this question

Topic: Immunity, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Feb/Mar 2018 Paper 1 Variant 2, question 40.

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