Immunology Exam 1

Immunology Exam 1
Immunology
1. Antibodies (Immunoglobulins):  Tag antigens for destruction

2. In humans, MHC II molecules are expressed by:  B cells dendritic cells and macrophages

3. Which of the following molecules is expressed by an effector T cell that function as a helper T cell?  CD4

4. T cell receptors, when co-expressed with CD8 receptors, are restricted to recognize and bind peptide fragments from:  MHC class I

5. Any naïve B cell expresses and secretes Immunoglobin receptors:  On their cell membrane

6. The thymus is the site for differentiation and development of  T cells

7. Which of the following is a primary lymphoid organ?  Bone marrow

8. Which of the following cells load peptide fragments onto MHC class II molecules?  Dendritic cells

9. Fragments of pathogens (found outside of a vesicle but in the cytosol) are presented to T cells by  MHC class I molecules to CD8 T cells

10. Upon encountering an appropriate peptide-MHC class I on an infected cell  CD8 cytotoxic T cells destroy the infected cell

11. TCRs are secreted when T cells are activated  False

12. Peptides bind to MHC molecules through structurally related anchor residues  True

13. Peptides are bound to MHC class II molecules by their ends  False WAS ON EXAM 3 !!!
14. TCRs expressed by a single T cell are identical EXAM 3  True both TCR and BCR are the same.