题目内容

Which Ig has no hinge region ()

A. IgG
B. IgA
C. IgM
D. IgD
E. sIgA

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The antigen binding region of IgM is formed by the following domains ()

A. VH+VL
B. CH+CL
C. Hinge region
D. VH
E. CL

Components participating in the classical activation pathway is ()

A. C1q
B. IgG4
C. IL-2
D. H factor
E. B factor

Which scientist applies cowpox vacacine preventing smallpox firstly ()?

A. Warner
B. Jenner
C. Burnet
D. Mitchell
E. Claman

The immunity refers to the natural ability of the body to ()

A. Protect from certain diseases
B. Fight against specific disease
C. Remove old or dead cells
D. kill and remove pathogen
E. Recognize and remove antigens

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