問題詳情
19.The switch of one B cell from producing one class of antibody to another antibody class that is responsive to the same antigen is due to
(A) the rearrangement of immunoglobulin heavy-chain C region DNA.
(B) a switch in the kind of antigen-presenting cell that is involved in the immune response.
(C) a patient's reaction to the first kind of antibody made by the plasma cells.
(D) the rearrangement of V region genes in that clone of responsive B cells.
參考答案
答案：A
難度：非常困難0.152174
統計：A(7),B(9),C(5),D(19),E(0)