Immunology MCQs with Answers

adminFebruary 26, 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 primary function of macrophages is to:

Phagocytose pathogens

Activate B cells

Produce antibodies

2 / 40

The receptor on B cells that binds to antigens is:

CD4

B cell receptor (BCR)

T cell receptor (TCR)

3 / 40

The hypersensitivity reaction involving immune complexes is known as:

Type III

Type II

Type I

4 / 40

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

Antigen

Antibody

Adjuvant

5 / 40

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

Helper T cells

Cytotoxic T cells

B cells

6 / 40

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

Non-specificity

Immediate action

Memory

7 / 40

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

IgM

IgG

IgA

8 / 40

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

Helper T cells

B cells

Cytotoxic T cells

9 / 40

Which of the following is a secondary lymphoid organ?

Bone marrow

Thymus

Spleen

10 / 40

Which type of hypersensitivity involves T cell-mediated responses?

Type I

Type IV

Type II

11 / 40

The primary antibody produced in a secondary immune response is:

IgM

IgG

IgE

12 / 40

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

Subunit vaccine

Attenuated vaccine

Inactivated vaccine

13 / 40

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

Pinocytosis

Phagocytosis

Exocytosis

14 / 40

The primary lymphoid organs are:

Bone marrow and thymus

MALT and GALT

Lymph nodes and spleen

15 / 40

The first line of defense against pathogens includes:

T cells

Antibodies

Skin and mucous membranes

16 / 40

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

Neutrophils

Natural killer cells

B cells

17 / 40

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

Natural killer cells

B cells

Dendritic cells

18 / 40

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

Innate immunity

Passive immunity

Adaptive immunity

19 / 40

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

Active immunity

Passive immunity

Innate immunity

20 / 40

The complement system can be activated by:

Classical pathway

Apoptotic pathway

Cytotoxic pathway

21 / 40

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

Neutralization

Agglutination

Opsonization

22 / 40

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

CD4+ T cells

CD8+ T cells

B cells

23 / 40

Which cell is primarily responsible for the production of antibodies?

Dendritic cell

Macrophage

Plasma cell

24 / 40

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

CD28

CD19

CD3

25 / 40

The primary function of neutrophils is to:

Phagocytose bacteria

Produce antibodies

Present antigens

26 / 40

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

CD19

CD3

27 / 40

Which immunoglobulin can cross the placenta?

IgA

IgG

IgM

28 / 40

Which cell type is primarily involved in allergic reactions?

Neutrophils

Eosinophils

Mast cells

29 / 40

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

Diapedesis

Extravasation

Chemotaxis

30 / 40

Which cytokine is known for its antiviral properties?

Interleukin-1

Tumor necrosis factor

Interferon

31 / 40

Which complement component acts as an opsonin?

C3b

C5a

32 / 40

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

Natural killer cell

Eosinophil

Dendritic cell

33 / 40

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

Hapten

Epitope

Allergen

34 / 40

The primary function of regulatory T cells is to:

Activate B cells

Produce antibodies

Suppress immune responses

35 / 40

Which type of hypersensitivity reaction is mediated by IgE?

Type III

Type II

Type I

36 / 40

Which cells are primarily responsible for humoral immunity?

T cells

Macrophages

B cells

37 / 40

Which immunoglobulin is found in mucosal secretions?

IgD

IgA

IgM

38 / 40

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

Neutralize toxins

Promote T cell proliferation

Inhibit macrophages

39 / 40

Helper T cells express which surface marker?

CD8

CD3

CD4

40 / 40

The immunoglobulin primarily involved in allergic reactions is:

IgG

IgE

IgA

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adminFebruary 26, 2024

0 23 2 minutes read