CBSE Class 10 Answered

Antigen is any foreign substance that stimulates the production of antibodies by the immune system. Antigens include foreign proteins, bacteria, viruses, pollen, and other materials. Antigens cause the immune system to make a specific immune response.

Antibody is a protein substance made by the body’s immune system in response to an antigen. It is produced by a plasma cell in the lymphatic system or bone marrow. An antibody binds to the specific antigen that has stimulated the immune system. Once bound, the antigen can be destroyed by other cells of the immune system.