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O-LevelBiologyTransport in Humans5090/11 · Oct/Nov 2024 · Q201 Mark

Which statement about the immune system is correct?

Apathogen has its own antigens which will have the same shape as antibodies that bind to them.
BAntigens stimulate an immune response by phagocytes which produce antibodies.
CActive immunity involves acquiring antibodies from another individual and provides short-term protection against a pathogen.
DAntibodies are protein molecules that bind to antigens either leading to the destruction of pathogens or marking a pathogen for destruction by lymphocytes.

✓ Correct answer

D: Antibodies are protein molecules that bind to antigens either leading to the destruction of pathogens or marking a pathogen for destruction by lymphocytes.

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About this question

Topic
Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, Oct/Nov 2024 Paper 1 Variant 1, question 20.

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