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Kaplan Qbank USMLE



Author5 Posts
  #1

A bacterial superantigen

A. binds to B7 & CD28
B. Binds to beta chain of TCR & MHC II molecule of APC stimulating T cell activation

C. Binds to CD4 causing T cell activation
D. Presented by macrophage to a larger-than-normal number of CD4
E. Stimulates massive amount of IgG synthesis because of it's large size

  #2

C. Binds to CD4 causing T cell activation

  #3

B. Binds to beta chain of TCR & MHC II molecule of APC stimulating T cell activation

  #4

ans = b

  #5

B is right







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