超星 - B细胞 - 查题吧

多选题

Which of the following molecules are involved in the formation of B cell coreceptor?

A. CD19
B. CD20
CD21
D. CD22
E. CD81

单选题

Which of the following pairs of molecules provides the most important second signal for B cell activation?

A. CD28 on T cells and B7 on B cells
B. CD28 on B cells and B7 on T cells
CD40 on B cells and CD40L on T cells
D. CD40 on T cells and CD40L on B cells
E. LFA-1 on B cells and ICAM-1 on T cells

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单选题

The membrane immunoglobulin expressed by mature B cells is

A. only mIgM
B. only mIgD
C. only mIgE
D. both mIgM and mIgD
E. both mIgE and mIgD

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