Antibodies are proteins that are produced by white blood cells in response to foreign substances such as bacteria or viruses. They help to identify and neutralize these substances by binding to them and marking them for destruction by other parts of the immune system.

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Antibodies Are

Question 52

Multiple Choice

Antibodies are

A) chemical messengers produced by glands.
B) catalysts that speed the rate of chemical reactions.
C) compounds that transport lipids through the blood.
D) proteins produced by white blood cells as part of the immune response.

Correct Answer: