Antigens…
A. Are usually proteins or polypeptide molecules.
B. Can only be recognized by immune system cells previously exposed to that antigen.
C. Are normally absorbed from the gut via lymphatics and carried to mesenteric lymph nodes.
D. Induce a smaller immune response when protein synthesis is suppressed.
E. Are taken up by antigen-presenting macrophages which activate the immune system.
The correct statements about antigens are:
A. Are usually proteins or polypeptide molecules.
E. Are taken up by antigen-presenting macrophages which activate the immune system.
Antigens are primarily proteins or polypeptides and are recognized by the immune system when presented by antigen-presenting cells, such as macrophages.