A substance that is too small to stimulate antibody production by itself unless it is attached to a larger carrier molecule is called a(an):

Question

Quizplus · Accepted Answer

A hapten is a small molecule that cannot stimulate an immune response on its own, but can provoke an immune response when attached to a larger protein or carrier molecule. This is because the hapten is too small to be recognized as foreign by the immune system, but when bound to a larger molecule it can alter the shape and structure of the protein, making it recognizable as foreign by the immune system. Examples of haptens include certain drugs, chemicals, and toxins.

A Substance That Is Too Small to Stimulate Antibody Production