Question

9. Describe the results of the following events/items (pick about 2-3):

-Dendritic cells displaying antigen via the class-2 pathway.    B. B cell displaying antigen via the class-2 pathway.   C. Infected cell displaying antigen by the class -1 pathway.   D. Macrophage displaying antigen by the class-2 pathway.    E. Dendritic cells displaying antigen via the class-1 pathway.

10. If a replicating virus needs to avoid being attacked by the immune system, which of the above events (a-e) would it interfere with? Be able to explain your answer…

Answer 1

9.

C . Infected cell displaying .antigen by class -I pathway

All the immune cells of display the class I major histocompability complex and they are found on the surface of these cells. When an antigen enter in the body , the MHC I complex present this antigen to the cytotoxic T cells , that kill the protein of the pathogen by secreting some chemicals. Mostly the viral proteins are recognized by the MHC-I complex.

D. Macrophage displaying antigen by class-2 pathway

Macrophage also one of the immune cells that are antigen presenting cells. These cells identify and process antigen and these antigen are recognized by the MHC class II. Then MHC , activate T helper cells, that try to further T helper cell.

10. The replicating virus need to avoid immune cells by class I pathway because MHC-I present the viral protein to the cytotoxic T cells that kill the pathogen. Hence, option c is correct.