    Sentence)1:The :receptors,on.a killers P cell  must bind)\ to’, howssmany:\ MHC; antigen  complexes\in order to activate the cell>    Sentence 2: Helper\.T Cells “have <a sweaker  association. with, the\ MHC:antigen complex,  thanvobserved for killer T cells, meaning many.  Teceptors (around 200-300) on the helper  cell smustbe\ bound: by’ dn MHCéantigen \\in  order\to activate the helper:cell while killer:T  cells can be\activated by engagement of asingle  MHCantigen molecule.    