問題詳情
19. IgM is particularly efficient at fixing complement Because it ______.
(A) is a much larger antibody than the other isotypes
(B) has an extra CH domain
(C) is made first in an immune response and therefore has first access to Clq
(D) has five binding sites for Clq
(E) has easy access to extravascular areas.
參考答案
答案：99
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中