Antigen is a substance which
Question and options
Antigen is a substance which
- lowers body temperature
- destroys harmful bacteria
- triggers the immune system
- is used as an antidote to poison
Answer and explanation
Correct answer: C - triggers the immune system
An antigen is any substance that the immune system recognises as foreign and that triggers an immune response, such as the production of antibodies. Destroying bacteria is the work of antibodies and white blood cells, not of the antigen itself, and antigens neither lower body temperature nor act as antidotes.
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