Question

QUESTION 11 How is the immune system able to recognize a limitless number of different antigens and epitopes? While each lymphocyte carries receptors that recognize only one type of epitope, the immune system produces a wide variety of lymphocytes each of which carries unique receptors A genetic "memory" of the pathogens your parents encountered (and their parents and so on) is passed on to each generation, increasing the number of possible responses over time. Each lymphocyte is coated with many different receptors, each of which recognizes a different epitope. if a lymphocyte encounters an antigen it does not recognize, it immediately switches receptors until it finds one that is a match Each lymphocyte is coated with many different receptors, each of which recognizes a different epitope AND the immune system produces a wide variety of lymphocytes.

Answer 1

11.D.each lymphocytes are coated with various receptors each of them have different epitope.thus,it is easy to identify the difference between antigen and epitope.

12.C.MCH antigen and T cells get intracted in first signal.in the second co stimutlatory proteins on T cells and APC surface binding together

13.E.MHC vital function is to connent antigen presenting celks to T cells