Immunology Quiz 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

Helper T cells express which surface marker?

CD3

CD8

CD4

2 / 40

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

Eosinophil

Dendritic cell

Natural killer cell

3 / 40

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

Allergen

Hapten

Epitope

4 / 40

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

Dendritic cells

B cells

Natural killer cells

5 / 40

Which cell type is primarily involved in allergic reactions?

Neutrophils

Eosinophils

Mast cells

6 / 40

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

Adjuvant

Antigen

Antibody

7 / 40

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

IgA

IgM

IgG

8 / 40

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

Adaptive immunity

Passive immunity

Innate immunity

9 / 40

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

Cytotoxic T cells

Helper T cells

B cells

10 / 40

The complement system can be activated by:

Cytotoxic pathway

Classical pathway

Apoptotic pathway

11 / 40

The primary function of macrophages is to:

Phagocytose pathogens

Produce antibodies

Activate B cells

12 / 40

The primary function of neutrophils is to:

Produce antibodies

Present antigens

Phagocytose bacteria

13 / 40

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

B cells

Natural killer cells

Neutrophils

14 / 40

Which type of hypersensitivity reaction is mediated by IgE?

Type II

Type I

Type III

15 / 40

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

Extravasation

Chemotaxis

Diapedesis

16 / 40

Which of the following is a secondary lymphoid organ?

Bone marrow

Spleen

Thymus

17 / 40

The primary antibody produced in a secondary immune response is:

IgG

IgM

IgE

18 / 40

The receptor on B cells that binds to antigens is:

CD4

B cell receptor (BCR)

T cell receptor (TCR)

19 / 40

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

Innate immunity

Active immunity

Passive immunity

20 / 40

The primary lymphoid organs are:

Bone marrow and thymus

Lymph nodes and spleen

MALT and GALT

21 / 40

Which complement component acts as an opsonin?

C3b

C5a

22 / 40

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

Cytotoxic T cells

B cells

Helper T cells

23 / 40

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

B cells

CD4+ T cells

CD8+ T cells

24 / 40

The immunoglobulin primarily involved in allergic reactions is:

IgG

IgA

IgE

25 / 40

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

Exocytosis

Pinocytosis

Phagocytosis

26 / 40

Which cell is primarily responsible for the production of antibodies?

Plasma cell

Macrophage

Dendritic cell

27 / 40

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

Promote T cell proliferation

Neutralize toxins

Inhibit macrophages

28 / 40

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

Opsonization

Neutralization

Agglutination

29 / 40

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

Attenuated vaccine

Subunit vaccine

Inactivated vaccine

30 / 40

The hypersensitivity reaction involving immune complexes is known as:

Type I

Type II

Type III

31 / 40

Which immunoglobulin is found in mucosal secretions?

IgA

IgM

IgD

32 / 40

Which immunoglobulin can cross the placenta?

IgG

IgM

IgA

33 / 40

The first line of defense against pathogens includes:

T cells

Antibodies

Skin and mucous membranes

34 / 40

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

CD19

CD3

35 / 40

The primary function of regulatory T cells is to:

Activate B cells

Produce antibodies

Suppress immune responses

36 / 40

Which cytokine is known for its antiviral properties?

Tumor necrosis factor

Interferon

Interleukin-1

37 / 40

Which type of hypersensitivity involves T cell-mediated responses?

Type IV

Type II

Type I

38 / 40

Which cells are primarily responsible for humoral immunity?

T cells

B cells

Macrophages

39 / 40

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

Non-specificity

Memory

Immediate action

40 / 40

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

CD28

CD3

CD19

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adminFebruary 26, 2024

0 23 2 minutes read