MCQ Immunology: Antibodies

1. Which of the following antibody is an important host defense against encapsulated bacteria?
   a. IgG1
   b. IgG2
   c. IgG3
   d. IgG4
2. Which of the following immunoglobulin is the most abundant immunoglobulin in newborns?
   a. IgA
   b. IgM
   c. IgG
   d. IgD
   
   
   
3. Whch of the following immunoglobulin is produced early in the primary response to infection?
   a. IgE
   b. IgA
   c. IgG
   d. igM
4. Which of the following immunoglobulin is the main host defense against parasititc infections?
   a. Secretory IgA
   b. IgG
   c. IgM
   d. IgE
5. Which of the following immunoglobulin has the highest avidity of the immunoglobulins?
   a. IgA
   b. IgM
   c. IgE
   d. IgG
6. The order of percent of total immunoglobulin in serum is,
   a. IgM, IgA, IgG, IgD, IgE
   b. IgG, IgA, IgM, IgE, IgD
   c. IgG, IgA, IgM, IgE, IgD
   d. IgG, IgA, IgM, IgD, IgE
7. Which of the following antibody is prominent antigen receptor expressed on B Cells?
   a. IgG
   b. IgA
   c. IgM
   d. IgE
8. The antibody which is found in secretions is:
   a. IgD
   b. IgE
   c. IgG
   d. IgA
9. Which of the following antibody directly take part in opsonization process?
   a. IgM
   b. IgG
   c. IgA
   d. IgE
10. Complement fixation is one of the most important host defense against infections. The complement is activated by;
    a. IgM Only
    b. IgG only
    c. both IgM and IgG
    d. all five classes of antibodies activate complements.
    
    

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