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.