McqMate
| Q. |
A substance that stimulates the production of antibodies when introduced into a living organism is known as— |
| A. | carcinogen |
| B. | androgen |
| C. | antigen |
| D. | oestrogen |
| Answer» C. antigen | |
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Explanation: Antigens are the substance that when introduced into the body stimulates the production of an antibody. Antigens include toxins, bacteria, foreign blood cells, and the cells of transplanted organs. Antigens can also react with formed antibodies. Antigen-antibody reactions serve as host defenses against microorganisms and other foreign bodies, or are used in laboratory tests for detecting the presence of either antigen or antibody. The antigen city of a protein is determined by its sequence of amino acids as well as by its conformation. |
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