Antigens are molecules that the immune system recognizes as foreign to the body. These molecules can come from pathogens like bacteria, viruses, or fungi. When antigens enter the body, they trigger an immune response.
1. Antigens are not molecules that have receptor molecules on their surface. Receptor molecules are more commonly found on cells to bind with specific signaling molecules.
2. Antigens are not found exclusively on cancer cells. While cancer cells can express certain antigens, antigens are not specific to cancer cells alone.
3. Antigens do not attack specific lymphocytes. Lymphocytes are a type of white blood cell involved in the immune response, and they are activated by antigens to target foreign substances in the body.
