Immunology Multiple Choice Questions MCQs with Answers

1. Antibodies disappear very quickly in which immunity?
a. Active immunity
b. Naturally induced immunity
c. Passive immunity
d. Autoimmune response
Answer: c. Passive immunity

2. Which Portion of antibody structure is occupied by the variable chain?
a. Lower region
b. In between chain
c. Upper region
d. Middle region
Answer: c. Upper region

3. What kind of defense barrier is provided by the mucous membrane of the body?
a. Physical barrier
b. Mechanical barrier
c. Chemical barrier
d. Biological barrier
Answer: a. Physical barrier

4. How many kinds of antibodies are there?
a. Two
b. Four
c. Five
d. Six
Answer: c. Five

5. B lymphocytes are related to:
a. Bursa Fabricius
b. Thymus gland
c. Bacteria
d. None of these
Answer: a. Bursa Fabricius

6. T cells or T lymphocytes are produced by the…?
a. Bone marrow
b. Thymus gland
c. Spleen
d. Liver
Answer: b. Thymus gland

7. What is the most predominant immunoglobulin in the plasma?
a. Iga
b. IgG
c. IgM
d. IgE
Answer: b. IgG

8. Which of the following produces monoclonal antibodies?
a. Fermentation
b. Hybridoma technology
c. Genetic engineering
d. None of these
Answer: b. Hybridoma technology

Recommended: Immunology Online Practice Test

9. Which of the following IgG is targeted against Polysaccharides of encapsulated bacteria?
a. IgG1
b. IgG2
c. IgG3
d. IgG4
Answer: b. IgG2

10. Which of the following is serum hepatitis?
a. HBV
b. HCV
c. HAV
d. HIV
Answer: a. HBV

11. Antigen binding site on Immunoglobulin is located in…?
a. Light chain
b. Fc region of antibody
c. Heavy chain
d. Fab region of antibody
Answer: d. Fab region of antibody

12. Immunity in which Lymocytes recognizes the antigen and micro-organisms is known as:
a. Phagocytosis
b. Cell-mediated immunity
c. Tissue grafting
d. Humoral immunity
Answer: b. Cell-mediated immunity

13. Which of the following immunoglobulin is predominant in secondary responses?
a. IgA
b. IgG
c. IgM
d. IgE
Answer: b. IgG

14. Which is the smallest molecular weight immunoglobulin?
a. IgA
b. IgG
c. IgM
d. IgE
Answer: b. IgG

15. Antibodies clear out antigens by:
a. Neutralization
b. Precipitation
c. Agglutination
d. All of these
Answer: d. All of these

16. A very important branch of the medical and biological sciences that deals with the study of the immune system and is called:
a. Zoology
b. Biotechnology
c. Microbiology
d. Immunology
Answer: d. Immunology

17. Which of the following immunity is developed over your lifetime?
a. Active immunity
b. Acquired immunity
c. Passive immunity
d. Autoimmunity
Answer: b. Acquired immunity

18. Cell-mediated immunity is primarily driven by which of the following cells?
a. B Cells
b. T Cells
c. Mast cells
d. Thrombocytes
Answer: b. T Cells

19. Choose the correct statements about the IgM of humans?
a. IgM is primarily restricted in the circulation
b. IgM is produced by high-affinity plasma cells
c. IgM can protect the mucosal surface
d. IgM can cross the placenta
Answer: a. IgM is primarily restricted in the circulation

20. Choose the correct statements about interferons?
a. A type of Physical barrier
b. A type of Cellular barrier
c. A type of Physiological barrier
d. A type of Cytokine barrier

21. Which of the following cells of the immune system do not perform phagocytosis??
a. Basophil
b. Eosinophil
c. Neutrophil
d. Macrophage
Answer: a. Basophil

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