試題詳解

20. A monoclonal antibody differs from a polyclonal antibody in that monoclonal antibodies_______.
(A) are labeled with chemicals that can be visualized
(B) are produced by cells from the same organism that produced the antigen
(C) are synthesized by a population of identical, or “cloned” cells
(D) are synthesized only in living organisms
(E) have only a single polypeptide chain that can recognize an antigen