题目内容

At secondary immune responses, which kind of immunoglobulin has the highest concentration in serum?

A. IgD
B. IgE
C. IgG
D. IgM

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Which type of antigens have immunologic memory and isotype switching?

A. TI-1 antigens
B. TI-2 antigens
C. TI antigens
D. TD antigens

Which cell type can secrete antibodies?

A. Pre-B cells
B. Mature T cells
C. Mature B cells
D. Plasma cells

Which of the following are involved in immune synapses in T-cell activation? 1. MHC molecule 2. T cell receptor 3. Costimulatory molecules 4. Adhesion molecules

A. Only 1, 2
B. Only 1, 3
C. Only 1, 2, 3
D. 1, 2, 3, 4

Which of the following are the two main classes of T cell receptors (TCR)? 1. αβ 2. γδ 3. αγ 4. βδ

A. 1, 2
B. 2, 4
C. 3, 4
D. 1, 4