Question

______ are certain molecules that lymphocytes recognize as foreign and that elicit an immune response.

Options

• interleukins

• antigens

• antibodies

• immunoglobulins

Answer 1

Antigens are certain molecules that lymphocytes recognize as foreign and that elicit an immune response.

Explanation:

Antigens are molecules that lymphocytes recognize as foreign and that elicit an immune response. They are usually proteins or polysaccharides on the surface of pathogens, tumor cells, or other foreign substances, and they trigger the production of antibodies or the activation of immune cells. Interleukins are signaling molecules, antibodies/immunoglobulins are produced in response to antigens, but it is antigens themselves that are recognized by lymphocytes as foreign and initiate immune responses.