Explore topic-wise MCQs in Immune System.

This section includes 32 Mcqs, each offering curated multiple-choice questions to sharpen your Immune System knowledge and support exam preparation. Choose a topic below to get started.

1.

An insect bite may result in inflammation of that spot. It is triggered by alarm chemicals such as

A. Histamine and dopamine
B. Histamine and kinins
C. Interferon and opsonin
D. Interferons and histones
Answer» C. Interferon and opsonin
Discussion
2.

An example of innate immunity is

A. T-lymphocytes
B. B-lymphocyte
C. Neutrophils
D. Thyroid cells
Answer» D. Thyroid cells
Discussion
3.

Which is most abundant immunoglobulin

A. Ig A
B. Ig D
C. Ig G
D. Ig M
Answer» D. Ig M
Discussion
4.

AIDS is caused by

A. RNA virus
B. DNA virus
C. Herpes virus
D. Hepatitis virus
Answer» B. DNA virus
Discussion
5.

Active immunity is due to

A. Suppressor T-cells
B. killer T-cells
C. Memory cells
D. Helper T-cells
Answer» D. Helper T-cells
Discussion
6.

Acquired immunity is found in

A. Invertebrates
B. Vertebrates
C. Some invertebrates
D. Both vertebrates and invertibrates
Answer» C. Some invertebrates
Discussion
7.

Active immunity means

A. resistance developed before disease
B. Resistance developed after disease
C. Increased heart beat
D. Increased flow of blood
Answer» C. Increased heart beat
Discussion
8.

A person is injected with gammaglobulin against hepatitis B. It is

A. Artificially acquires passive immunity
B. Artificially acquires active immunity
C. Naturally acquires active immunity
D. Naturally acquires passive immunity
Answer» B. Artificially acquires active immunity
Discussion
9.

Acquired immunity as developed after vaccination or infection is found in

A. Vertebrates only
B. Invertebrates as wellas vertebrates
C. Plants
D. All the above
Answer» B. Invertebrates as wellas vertebrates
Discussion
10.

A noninfectious unnatural and unusual reaction to asubstance or condition is

A. Immunity
B. Allergy
C. Infection
D. Toxin
Answer» C. Infection
Discussion
11.

Antibodies belong to class of proteins

A. Structural
B. Transport
C. Immunoglobulin
D. Enzymatic
Answer» D. Enzymatic
Discussion
12.

Antibodies are produced by

A. Histiocytes
B. Mast cells
C. Plasma cells
D. Fibroblasts
Answer» D. Fibroblasts
Discussion
13.

Which of the following is correctly matched

A. National Institute of Virology Pune
B. National Institute of Communicable Diseases Lucknow
C. Central Drug Research Institute Kasauli
D. National Institute of Nutrition Mumbai
Answer» B. National Institute of Communicable Diseases Lucknow
Discussion
14.

Antibodies are formed by

A. T-cells
B. Monocytes
C. Phagocytes
D. B-cells
Answer» E.
Discussion
15.

Which is not involved in elicitation of immune response

A. Thymus
B. Spleen
C. Brain
D. Lymph nodes
Answer» D. Lymph nodes
Discussion
16.

Antibodies are complex

A. Lipoproteins
B. Steroids
C. Prostaglandins
D. Glycoproteins
Answer» E.
Discussion
17.

An Rh- woman married to Rh+ man gave birth to three children, one of which died of erythroblastosis foetalis. What is genotype of woman and man

A. Rh- Rh-, Rh+ Rh-
B. Rh+ Rh+, Rh+ Rh+
C. Rh- Rh+, Rh Rh+
D. Rh- Rh-, Rh- Rh-
Answer» B. Rh+ Rh+, Rh+ Rh+
Discussion
18.

An Rh- individual receives Rh+ blood. The recipient becomes

A. Sterlite
B. Dead
C. No reaction
D. Isoimmunised
Answer» E.
Discussion
19.

Which of the following cells of the immune system do not perform phagocytosis?

A. Macrophage
B. Neutrophil
C. Eosinophil
D. Basophil
Answer» E.
Discussion
20.

Monocytes differentiate into which kind of phagocytic cells?

A. Neutrophil
B. B cell
C. Macrophage
D. T cell
Answer» D. T cell
Discussion
21.

Which of the following statements is true about the IgM of humans?

A. IgM can cross the placenta
B. IgM can protect the mucosal surface
C. IgM is produced by high-affinity plasma cells
D. IgM is primarily restricted in the circulation
Answer» E.
Discussion
22.

Hepatitis is an example of _______.

A. Subunit Vaccine
B. Killer Vaccine
C. Toxoids Vaccine
D. Recombinant Vaccine
Answer» E.
Discussion
23.

Which of the following protects our body against disease-causing pathogens?

A. Respiratory system
B. Immune system
C. Digestive system
D. Respiratory system
Answer» C. Digestive system
Discussion
24.

The branch of biology, which involves the study of immune systems in all organisms is called_________.

A. Zoology
B. Microbiology
C. Immunology
D. Biotechnology
Answer» D. Biotechnology
Discussion
25.

How many types of antibodies are there?

A. Five
B. Three
C. Two
D. Four
Answer» B. Three
Discussion
26.

A molecule that produces an immune response is

A. Antigen
B. Antibody
C. Carcinogen
D. Mutagen
Answer» B. Antibody
Discussion
27.

A doctor suggested to a couple not to have more than one child because of

A. Rh+ male Rh- female
B. Rh- male Rh+ female
C. Rh+ male Rh+ female
D. Rh- male Rh- female
Answer» B. Rh- male Rh+ female
Discussion
28.

Which is involved in body defense

A. Neutrophils
B. Macrophages
C. Lymphocytes
D. All the above
Answer» E.
Discussion
29.

A disease due to allergic reaction is

A. Enteric fever
B. Yellow fever
C. Hay fever
D. trench fever
Answer» D. trench fever
Discussion
30.

A compound formed in an organism for inhibiting growth of another organism is

A. Antigen
B. Antibody
C. Antibiotic
D. Antiallergic
Answer» C. Antibiotic
Discussion
31.

A blood group has both A and B antigens but no antibodies, It is

A. A
B. O
C. AB
D. B
Answer» D. B
Discussion
32.

Which is involved in body defence?

A. Neutrophils
B. Macrophages
C. Lymphocytes
D. All the above
Answer» E.
Discussion