Immunology MCQs with Answers

adminFebruary 26, 2024Last Updated: October 15, 2024

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Welcome to the Immunology MCQs with Answers. In this post, we have shared Immunology Online Test for different competitive exams. Find practice Immunology Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Immunology.

Immunology, as such, is that part of the biomedical science which concerns itself generally with the anatomy and physiology of the immune system. Its concern is how a body can defend its system against such pathogens, including viruses, bacteria, and fungi; more specifically, it aims at the differentiation between dangerous invaders and the cells of the body. The main themes of research in immunology are mechanisms of immune responses, roles of the different classes of immune cells, especially T-cells and B-cells and design of vaccines and immunotherapies.

Aggressive knowledge in immunology is required for the cure and treatment of many diseases, for example, autoimmune diseases, allergies, even cancer. Researchers constantly develop newer vaccines and therapies that can possibly improve the fight of the immune system against infections and diseases.

This covers investigation of the phenomenon of immunological memory whereby the immune system can respond more quickly to pathogens it had previously encountered. This forms the basis for the principle of design that underlies vaccines intended to confer long-term immunity against certain diseases. Immunologists will carry into some genetic, molecular biology, and biochemical information that will identify all the necessary questions associated with regulation of the immune system and to what extent is it dysregulated. Targeted therapies and personalized medicine, for example will require inclusion.

Immunology Online Quiz

By presenting 3 options to choose from, Immunology Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Immunology Questions and Answers and click over the correct answer.

Test Name: Immunology MCQ Quiz Practice
Type: Quiz Test
Total Questions: 40
Total Marks: 40
Time: 40 minutes

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Immunology

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1 / 40

The complement system can be activated by:

Cytotoxic pathway

Classical pathway

Apoptotic pathway

2 / 40

The process by which immune cells leave the bloodstream to enter tissues is called:

Extravasation

Diapedesis

Chemotaxis

3 / 40

The hypersensitivity reaction involving immune complexes is known as:

Type III

Type II

Type I

4 / 40

The major histocompatibility complex (MHclass I molecules present antigens to:

CD8+ T cells

CD4+ T cells

B cells

5 / 40

The process of coating a pathogen with antibodies to enhance phagocytosis is called:

Agglutination

Neutralization

Opsonization

6 / 40

Which of the following cells is a professional antigen-presenting cell?

Eosinophil

Natural killer cell

Dendritic cell

7 / 40

Which cytokine is known for its antiviral properties?

Interferon

Interleukin-1

Tumor necrosis factor

8 / 40

A substance that enhances the body's immune response to an antigen is called:

Antigen

Antibody

Adjuvant

9 / 40

Which immunoglobulin can cross the placenta?

IgA

IgM

IgG

10 / 40

The primary function of macrophages is to:

Produce antibodies

Activate B cells

Phagocytose pathogens

11 / 40

The vaccine type that uses a weakened form of the pathogen is called:

Subunit vaccine

Attenuated vaccine

Inactivated vaccine

12 / 40

The major function of interleukin-2 (IL-2) is to:

Neutralize toxins

Promote T cell proliferation

Inhibit macrophages

13 / 40

Which cells are involved in the destruction of tumor cells and virally infected cells?

B cells

Natural killer cells

Neutrophils

14 / 40

The primary function of neutrophils is to:

Present antigens

Phagocytose bacteria

Produce antibodies

15 / 40

The first line of defense against pathogens includes:

T cells

Antibodies

Skin and mucous membranes

16 / 40

Helper T cells express which surface marker?

CD4

CD3

CD8

17 / 40

The receptor on B cells that binds to antigens is:

B cell receptor (BCR)

T cell receptor (TCR)

CD4

18 / 40

Which complement component acts as an opsonin?

C5a

C3b

19 / 40

Which molecule acts as a costimulatory signal for T cell activation?

CD19

CD3

20 / 40

Which immunoglobulin is the first to respond during an initial exposure to an antigen?

IgA

IgG

IgM

21 / 40

Which molecule is essential for T cell receptor (TCR) signaling?

CD28

CD19

CD3

22 / 40

Which of the following is a secondary lymphoid organ?

Bone marrow

Thymus

Spleen

23 / 40

Which type of hypersensitivity reaction is mediated by IgE?

Type III

Type II

Type I

24 / 40

The immunoglobulin primarily involved in allergic reactions is:

IgE

IgG

IgA

25 / 40

Which immunoglobulin is found in mucosal secretions?

IgD

IgM

IgA

26 / 40

The cell type that directly kills virus-infected cells is:

B cells

Cytotoxic T cells

Helper T cells

27 / 40

Which cell type is primarily involved in allergic reactions?

Neutrophils

Eosinophils

Mast cells

28 / 40

Which type of immunity is provided by the transfer of antibodies from another individual?

Innate immunity

Active immunity

Passive immunity

29 / 40

The primary lymphoid organs are:

MALT and GALT

Lymph nodes and spleen

Bone marrow and thymus

30 / 40

The primary antibody produced in a secondary immune response is:

IgE

IgM

IgG

31 / 40

The primary function of regulatory T cells is to:

Suppress immune responses

Activate B cells

Produce antibodies

32 / 40

Which type of hypersensitivity involves T cell-mediated responses?

Type IV

Type II

Type I

33 / 40

The process by which a cell engulfs a particle or another cell is called:

Phagocytosis

Pinocytosis

Exocytosis

34 / 40

The region of an antigen that is recognized by an antibody is called:

Epitope

Allergen

Hapten

35 / 40

Which part of the immune system is responsible for immediate, non-specific defense?

Passive immunity

Innate immunity

Adaptive immunity

36 / 40

Which cells are responsible for producing cytokines that regulate the immune response?

Helper T cells

Cytotoxic T cells

B cells

37 / 40

Which cells are primarily responsible for humoral immunity?

Macrophages

T cells

B cells

38 / 40

Which cells are known as antigen-presenting cells (APCs)?

Natural killer cells

Dendritic cells

B cells

39 / 40

Which cell is primarily responsible for the production of antibodies?

Plasma cell

Dendritic cell

Macrophage

40 / 40

Which of the following is a characteristic of the adaptive immune response?

Memory

Immediate action

Non-specificity

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adminFebruary 26, 2024Last Updated: October 15, 2024

0 23 2 minutes read