Antibodies are proteins that are produced by the immune system in response to the presence of foreign substances (known as antigens) in the body, such as pathogens like viruses and bacteria. Antibodies help to recognize and neutralize these antigens, thereby protecting the body from infections and diseases.

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What Is an Antibody

Question 32

Multiple Choice

What is an antibody?

A) a type of protein that helps protect the body from pathogens.
B) a protein that catalyzes chemical reactions in the body.
C) a protein that helps circulate lipids in the blood.
D) a protein that regulates the acid base balance (pH) in the body.

Correct Answer: