Which of the following statements regarding antigens and antibodies is false?
A. An antibody usually recognizes and binds to an antigenic determinant.
B. A single antigen may stimulate the immune system to make several distinct antibodies to it.
C. Most antigens are proteins or large polysaccharides on the surfaces of viruses or foreign cells.
D. Each antibody has only one antigen-binding site.
Answer:D
Which of the following statements regarding antigens and antibodies is false?
A. An antibody usually recognizes and binds to an antigenic determinant. B. A single antigen may stimulate the immune system to make several distinct antibodies to it. C. Most antigens are proteins or large polysaccharides on the surfaces of viruses or foreign cells. D. Each antibody has only one antigen-binding site.