What is defined as an antibody?

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What is defined as an antibody?

An antibody is a protein produced by the body in response to antigens. These immunoglobulins are made by B cells and are specialized to recognize specific molecules on invaders or toxins. When an antibody binds an antigen, it can neutralize the threat directly or mark it for attack by other parts of the immune system, such as phagocytes or the complement system. Antibodies have a distinct Y-shaped structure with variable regions that determine exactly which antigen they recognize. The other options describe substances that are not antibodies: a lipid substance, a nucleic acid, or a carbohydrate.

An antibody is a protein produced by the body in response to antigens. These immunoglobulins are made by B cells and are specialized to recognize specific molecules on invaders or toxins. When an antibody binds an antigen, it can neutralize the threat directly or mark it for attack by other parts of the immune system, such as phagocytes or the complement system. Antibodies have a distinct Y-shaped structure with variable regions that determine exactly which antigen they recognize. The other options describe substances that are not antibodies: a lipid substance, a nucleic acid, or a carbohydrate.

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