Microbiology, 2021

18 • Review Questions 761
5. MHC I molecules present
a. processed foreign antigens from
proteasomes.
b. processed self-antigens from
phagolysosome.
c. antibodies.
d. T cell antigens.
6. MHC II molecules present
a. processed self-antigens from proteasomes.
b. processed foreign antigens from
phagolysosomes.
c. antibodies.
d. T cell receptors.
7. Which type of antigen-presenting molecule is
found on all nucleated cells?
a. MHC II
b. MHC I
c. antibodies
d. B-cell receptors
8. Which type of antigen-presenting molecule is
found only on macrophages, dendritic cells, and
B cells?
a. MHC I
b. MHC II
c. T-cell receptors
d. B-cell receptors
9. What is a superantigen?
a. a protein that is highly efficient at
stimulating a single type of productive and
specific T cell response
b. a protein produced by antigen-presenting
cells to enhance their presentation
capabilities
c. a protein produced by T cells as a way of
increasing the antigen activation they
receive from antigen-presenting cells
d. a protein that activates T cells in a
nonspecific and uncontrolled manner
10. To what does the TCR of a helper T cell bind?
a. antigens presented with MHC I molecules
b. antigens presented with MHC II molecules
c. free antigen in a soluble form
d. haptens only
11. Cytotoxic T cells will bind with their TCR to
which of the following?
a. antigens presented with MHC I molecules
b. antigens presented with MHC II molecules
c. free antigen in a soluble form
d. haptens only
12. A ________ molecule is a glycoprotein used to
identify and distinguish white blood cells.
a. T-cell receptor
b. B-cell receptor
c. MHC I
d. cluster of differentiation
13. Name the T helper cell subset involved in
antibody production.
a. T H 1
b. T H 2
c. T H 17
d. CTL
14. Which of the following would be a T-dependent
antigen?
a. lipopolysaccharide
b. glycolipid
c. protein
d. carbohydrate
15. Which of the following would be a BCR?
a. CD4
b. MHC II
c. MHC I
d. IgD
16. Which of the following does not occur during
the lag period of the primary antibody
response?
a. activation of helper T cells
b. class switching to IgG
c. presentation of antigen with MHC II
d. binding of antigen to BCRs
17. A patient is bitten by a dog with confirmed
rabies infection. After treating the bite wound,
the physician injects the patient with antibodies
that are specific for the rabies virus to prevent
the development of an active infection. This is
an example of:
a. Natural active immunity
b. Artificial active immunity
c. Natural passive immunity
d. Artificial passive immunity
18. A patient gets a cold, and recovers a few days
later. The patient's classmates come down with
the same cold roughly a week later, but the
original patient does not get the same cold
again. This is an example of:
a. Natural active immunity
b. Artificial active immunity
c. Natural passive immunity
d. Artificial passive immunity