Antigens are ________.
A) proteins found in the blood that cause foreign blood cells to clump
B) proteins embedded in B-cell membranes
C) proteins that consist of two light and two heavy polypeptide chains
D) foreign molecules that trigger an immune response
E) proteins released during an inflammatory response

Question

Quizplus · Accepted Answer

Antigens are foreign molecules that trigger an immune response. They can be proteins, polysaccharides, lipids or nucleic acids. When an antigen enters the body, immune cells recognize it as foreign and mount a response to eliminate it.

Antigens Are ________