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Which of the following is not a secondary lymphoid organ?
a. Spleen
b. Thymus
c. Lymph nodes
d. Liver
e. Tonsils - 🧠 ANSWER ✔✔b. Thymus
Which of the following is not a component of the reticuloendothelial cell
system?
,a. Microglial cells
b. Kupffer cells
c. Langerhans cells
d. Neutrophils
e. Monocytes - 🧠 ANSWER ✔✔d. Neutrophils (E. Monocytes, possibly)
Opsonization is a term to describe what?
a. Lysis of bacteria
b. Coating of bacteria
c. Ingestion of bacteria
d. Killing of bacteria
e. Phagocytosis - 🧠 ANSWER ✔✔b. Coating of bacteria
Which of the following does not describe a role of antibodies in host
defense?
,a. They serve as a bridge between bacteria and phagocytes
b. They lyse bacteria
c. They enhance complement binding to the bacterial cell wall
d. They prevent viruses from infecting cells
e. They bind pathogens in mucus secretions - 🧠 ANSWER ✔✔b. They lyse
bacteria
MHC Class I and II molecules differ in all of the following except
a. Types of T cells they stimulate
b. Types of cells they are expressed on
c. Which chromosome they are located on
d. Types of antigens they present
e. Whether or not they have foreign peptides in the antigen-binding groove
- 🧠 ANSWER ✔✔c. Which chromosome they are located on
The primary role of the proteasome in antigen presentation is to
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, a. Prevent premature folding of MHC class I molecules
b. Process cytoplasmic proteins
c. Degrade recycled MHC molecules
d. Bind HLA-DM in the endosome
e. Chaperone peptides to the cell surface - 🧠 ANSWER ✔✔b. Process
cytoplasmic proteins
Peptides that bind to MHC class I molecules differ from peptides that bind
to MHC class II molecules in all except which of the following ways?
a. They are shorter
b. They were processed by different proteases
c. They anchor in the middle instead of the end of the MHC molecule
d. They interact with different subsets of T cells - 🧠 ANSWER ✔✔c. They
anchor in the middle instead of the end of the MHC molecule
HLA-DM is primarily involved in the