試題詳解

19. Which of the following statements accurately describe how memory B cells in a secondary immune response differ fom differ naïve B
a romive s cells ina primary immune response? (Selecttall all that apply.)
(A) The antibodies in dies produced have higher attinity in a secondary immune response.
(B) The frequency of antigen-specific B Higherlevelcite cells is lower in a secondary immune response.
(C) Higher levels of IgM are produced in secondary immune responses.
(D) Memory B cells can respond respond with wi reduced reduced oro non T-cell help he compar cpared to naïve B cells.
(E) Memory B cells express higher levels of MHC class II molecules.