A macromolecule that is capable of eliciting an immune response in an immunocompetent host is called:

Question

Quizplus · Accepted Answer

An antigen is a macromolecule (such as a protein or polysaccharide) that can be recognized by the immune system as foreign and can elicit an immune response in an immunocompetent host. Antibodies, on the other hand, are proteins produced by the immune system in response to an antigen to help eliminate or neutralize it. Haptens are small molecules that can bind to larger molecules to become immunogenic but cannot elicit an immune response on their own. Acute-phase reactants are proteins that increase in concentration in response to inflammation or infection but are not directly related to the immune response to an antigen.

A Macromolecule That Is Capable of Eliciting an Immune Response