1. The process of killing a bacteria using what is called the oxygen-dependent respiratory burst is a mechanism of what type of cells?
E. Both B & T
2. The alternative pathway of the complement system is activated by:
A. antigen-antibody reactions
B. polysaccharides from yeasts and gram-negative bacteria
C. none of the above
D. Both A & B
3. After processing, the MHC molecules display the short amino acid sequences derived from the antigen by different classes of T cells.
Class 1 pairs with:
C. CD 40 Ligand
D. CD 22
4. In Hyper-IgM Syndrome, there is a defect that affects class switching of antibodies. IgM levels are high,
while IgG, IgA and IgE levels are significantly depressed or absent.
This occurs becuase T cells are unable to produce:
C. CD40 Ligand
D. CD 28/CTLA4
5. The second most common form of SCID leads to accumulation of adenosine, 2’-deoxyadenosine, and 2’-O-methyladenosine,
all of which are toxic to T cells and cause T cell apoptosis.
This is caused by a deficiency in:
A. NADPH oxidase
B. adenosine deaminase
C. MAC complex