13. MHC class II molecules are found on: a) Virtually all cells in the body. b)

Question

13. MHC class II molecules are found on: a) Virtually all cells in the body. b) Dendritic cells c) Only y-interferon activated cells d) Virtually all nucleated cells in the body e) Only on virally infected cells 14. T-cell receptors recognize: a) Native antigen b) Free linear antigenic peptide e) MHC P2-microglobulin d) Linear antigen peptide in the MHC eroove e) Carbohydrate antigens associated with the MHC 15. CD4 b) Is heterodimeric c) Binds processed peptide in its outer groove d) Binds to MHC class II on antigen-presenting cells e) Is highly polymorphic 16. In the nude mouse thymus the majority of aß T-cells are b)CDA CD8 c) CD4-CDs d) All of the above e None of the abose 17 A clone of antihody-forming cells can switch from synthesizing one class of antibody to synth another class Such switcehes involve changes in a) V rogions of heavy and light chains b) C regions of heavy chains ci C regions of light chains d) C and V regions of heavy chains e) C and V regions of heavy and light chains Noor of the above 3. Expresoon of MilC genes is Dominant for matermal genes Dorminant for patemal genes dy Dependent on thy mic selection ds on the antigenic exposure of the individual

Explanation / Answer

13. Dendritic cells

14. MHC b2 microglobuins

15. Binds to MHC class2 on antigen presenting cells

18. Codominant

19.cd3

21. Cytotic t-cells

23. T- cells

24. Autograft

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