Chapter 2. Nature of Antigens and the Major Histocompatibility Complex Multiple Choice 1. An antigenic determinant is also called: A. an immunogen. B. an epitope. C. an antibody. D. a polysaccharide. ANS: B 2. Which of the following would be the most effective immunogen? A. One that is genetically foreign and has a single epitope B. One with a molecular weight of less than 10,000 Da C. One with multiple epitopes with many specificities D. One with multiple epitopes with a single repeated specificity ANS: C 3. A 50-kDa protein from a bacterial cell that has numerous different epitopes would be called: A. a hapten but not an antigen. B. a hapten and an antigen. C. an antigen but not an immunogen. D. an immunogen and an antigen. ANS: D 4. Which of the following molecules is the best immunogen? A. Protein B. Polysaccharide C. Nucleic acid D. Lipid ANS: A 5. Which of the following is a low-molecular-weight molecule that has one binding site for an antibody? A. Antigen B. Haptenread more
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