Antigens are specific molecules that the body recognizes as foreign and triggers an immune response against. They can be parts of pathogens such as viruses or bacteria, or they can be present on cells or tissues from another organism, such as during a transplant. Antibodies are proteins that the body produces against antigens to help identify and neutralize them.

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Antigens Are

Question 9

Multiple Choice

Antigens are

A) specific molecules, or parts of molecules, that the body recognizes as foreign.
B) proteins the body produces against invading substances.
C) cells that protect the body against invaders.
D) proteins on the surface of our cells that pathogens attach to.
E) enzymes secreted to destroy a pathogen's cell wall.

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