Immunology Quiz Questions with Verified Answers 2026

Immunology Quiz Questions with
Verified Answers 2026
Which is correct?


A. The class II MHC molecules present microbial antigens that are recognized by CD8+T cells
B. The class II MHC molecules present microbial antigens that are recognized by CD4+T cells
C. The class I MHC molecules present microbial antigens that are recognized by CD4+T cells
D. The class I MHC molecules present microbial antigens that are recognized by B cells -
<CORRECT ANSWER >>B. The class II MHC molecules present microbial antigens that are
recognized by CD4+T cells


What is the role of the complement system?


A. To cause lysis of microbes
B. To cause inflammation
C. To opsonize microbes
D. All of the above - <CORRECT ANSWER >>D. All of the above


What is the function of the FAB region of an antibody?


A. Bind to receptors on macrophages
B. Bind to receptors on T cells
C. Bind to antigens
D. Determine the class/type of the antibody - <CORRECT ANSWER >>C. Bind to antigens


What is a typical monomeric antibody made of?

, A. 1 heavy chain and 1 light chain
B. 2 heavy chains and 1 light chain
C. 2 heavy chains and 2 light chains
D.1 heavy chain and 2 light chains - <CORRECT ANSWER >>C. 2 heavy chains and 2 light chains


Which of the following antibodies can serve both as a secreted antibody and as a B-cell
receptor?


A. IgG
B. IgA
C. IgM
D. IgE - <CORRECT ANSWER >>C. IgM


Which of the following antibodies is a mediator of the allergic response?


A. IgG
B. IgA
C. IgM
D. IgE - <CORRECT ANSWER >>D. IgE


Which of the following statements is correct?


A. TH1 subtype of T cells activates macrophages
B. TH1 subtype of T cells activates B cells to secrete IgE only
C. TH1 subtype of T cells activate B cells to secrete antibodies
D. a+b