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Kaplan Qbank USMLE



Author3 Posts
  #1

Which of the following is the most important costimulatory signal
provided to a T cell from an antigen-presenting cell?
A. B7 molecules interacting with CD 28
B. B7 molecules interacting with LFA- 1
C. ICAM-I interacting with LFA-1
D. LFA-3 interacting with CD 28
E. MHC class II interacting with T cell receptor

  #2

I think it is E....
Mhc class II peptides is on the surface of antigen presenting cells,CD4+ cells bind them...

  #3

ITS A







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