12. The quantity of IgM antibodies can be imorant disqos A. viral infection ofte
ID: 300938 • Letter: 1
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12. The quantity of IgM antibodies can be imorant disqos A. viral infection often results in very high IgM levels B. IgM is easier to detect than the other isotypesst re-infections D. evels of IgM are often related to a first exposure to a pathogen A. binds directly to peptide antigen B. binds to an invariant portion of MHC class 1 molecules C. binds to an invariant portion of MHC class Il molecules D. binds to CD8 on the T cell surface E. binds to the peptide-binding site of MHC class II 14. Involves the production of secreted antibody A. cell-mediated immunity B. inflammation C. humoral immunity D. thymocytes 15. Primary interactions between antigens and antibodies involve all of the following except A. covalent bonds B. van der Waals forces C. hydrophobic forces D. electrostatic forces E. a very close fit between an epitope and the antibody 16. The colostrum, or first milk of a nursing mother, contains IgA that is transferred to the nursing child A. True B. False 17. As compared to a primary immune response, a typical secondary response produces A. about the same antibody level but the level persists longer B. more antibody but the level is slower to develop C. a much higher antibody level which also persists longer D. a lower level of antibody that declines rapidly 18. B cells once challenged( or activated) by antigen give rise to two classes of cells: A. mature T cells, mature B cells B. neutrophils, memory cells C. memory cells, plasma cells D plasma cells, IgMExplanation / Answer
14. Option C is correct. Humoral immunity involves the production of secreted antibodies.
15. Option A is correct. Primary interactions between antigens and antibodies involve all of the following except covalent bonds.
16. True. The colostrum or first milk of a nursing mother contains IgA, that is transferred to the nursing child.
18. Option C is correct. B cells once challenged or activated by antigens give rise to memory cells and plasma cells.
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