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 is the branch of biomedical science that explores the immune system’s structure and function. It focuses on how the body defends itself against pathogens such as viruses, bacteria, and fungi, and how it differentiates between harmful invaders and the body’s own cells. Key areas of study within immunology include the mechanisms of immune responses, the roles of different immune cells like T-cells and B-cells, and the development of vaccines and immunotherapies.

A robust understanding of immunology is crucial for advancing treatments for various diseases, including autoimmune disorders, allergies, and cancer. Researchers in this field work on developing new vaccines and therapies that can enhance the immune system’s ability to fight off infections and diseases.

Immunology also involves studying immunological memory, which allows the immune system to respond more effectively to previously encountered pathogens. This concept is fundamental to the development of vaccines, which aim to create lasting immunity against specific diseases.

By integrating knowledge from genetics, molecular biology, and biochemistry, immunologists strive to uncover the complexities of immune regulation and dysregulation. This interdisciplinary approach helps in the design of targeted treatments and personalized medicine strategies.

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 regulatory T cells is to:

Produce antibodies

Activate B cells

Suppress immune responses

2 / 40

Which of the following is a secondary lymphoid organ?

Bone marrow

Thymus

Spleen

3 / 40

Which immunoglobulin is found in mucosal secretions?

IgD

IgM

IgA

4 / 40

The primary lymphoid organs are:

Bone marrow and thymus

Lymph nodes and spleen

MALT and GALT

5 / 40

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

Hapten

Allergen

Epitope

6 / 40

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

Attenuated vaccine

Subunit vaccine

Inactivated vaccine

7 / 40

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

Cytotoxic T cells

Helper T cells

B cells

8 / 40

Which cells are primarily responsible for humoral immunity?

Macrophages

T cells

B cells

9 / 40

Which cell type is primarily involved in allergic reactions?

Mast cells

Neutrophils

Eosinophils

10 / 40

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

IgG

IgM

IgA

11 / 40

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

CD19

CD3

12 / 40

The receptor on B cells that binds to antigens is:

T cell receptor (TCR)

CD4

B cell receptor (BCR)

13 / 40

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

Antibody

Adjuvant

Antigen

14 / 40

The primary function of macrophages is to:

Activate B cells

Phagocytose pathogens

Produce antibodies

15 / 40

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

Neutrophils

Natural killer cells

B cells

16 / 40

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

Chemotaxis

Diapedesis

Extravasation

17 / 40

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

Innate immunity

Adaptive immunity

Passive immunity

18 / 40

The first line of defense against pathogens includes:

Antibodies

Skin and mucous membranes

T cells

19 / 40

The hypersensitivity reaction involving immune complexes is known as:

Type II

Type III

Type I

20 / 40

The primary antibody produced in a secondary immune response is:

IgE

IgG

IgM

21 / 40

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

B cells

Helper T cells

Cytotoxic T cells

22 / 40

Which complement component acts as an opsonin?

C5a

C3b

23 / 40

Helper T cells express which surface marker?

CD3

CD4

CD8

24 / 40

The primary function of neutrophils is to:

Produce antibodies

Phagocytose bacteria

Present antigens

25 / 40

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

Agglutination

Neutralization

Opsonization

26 / 40

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

B cells

Natural killer cells

Dendritic cells

27 / 40

The immunoglobulin primarily involved in allergic reactions is:

IgA

IgG

IgE

28 / 40

Which immunoglobulin can cross the placenta?

IgA

IgM

IgG

29 / 40

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

Exocytosis

Pinocytosis

Phagocytosis

30 / 40

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

CD28

CD3

CD19

31 / 40

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

Active immunity

Innate immunity

Passive immunity

32 / 40

Which cytokine is known for its antiviral properties?

Tumor necrosis factor

Interleukin-1

Interferon

33 / 40

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

B cells

CD8+ T cells

CD4+ T cells

34 / 40

Which type of hypersensitivity reaction is mediated by IgE?

Type III

Type II

Type I

35 / 40

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

Dendritic cell

Eosinophil

Natural killer cell

36 / 40

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

Memory

Immediate action

Non-specificity

37 / 40

Which cell is primarily responsible for the production of antibodies?

Plasma cell

Dendritic cell

Macrophage

38 / 40

Which type of hypersensitivity involves T cell-mediated responses?

Type I

Type IV

Type II

39 / 40

The complement system can be activated by:

Apoptotic pathway

Classical pathway

Cytotoxic pathway

40 / 40

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

Neutralize toxins

Inhibit macrophages

Promote T cell proliferation

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adminFebruary 26, 2024

0 23 2 minutes read