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 lymphoid organs are:

MALT and GALT

Lymph nodes and spleen

Bone marrow and thymus

2 / 40

The primary antibody produced in a secondary immune response is:

IgM

IgE

IgG

3 / 40

The complement system can be activated by:

Classical pathway

Cytotoxic pathway

Apoptotic pathway

4 / 40

The receptor on B cells that binds to antigens is:

T cell receptor (TCR)

CD4

B cell receptor (BCR)

5 / 40

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

IgM

IgG

IgA

6 / 40

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

Immediate action

Memory

Non-specificity

7 / 40

The primary function of macrophages is to:

Phagocytose pathogens

Produce antibodies

Activate B cells

8 / 40

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

Attenuated vaccine

Inactivated vaccine

Subunit vaccine

9 / 40

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

Phagocytosis

Exocytosis

Pinocytosis

10 / 40

Which type of hypersensitivity reaction is mediated by IgE?

Type II

Type I

Type III

11 / 40

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

Active immunity

Innate immunity

Passive immunity

12 / 40

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

Adaptive immunity

Innate immunity

Passive immunity

13 / 40

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

Eosinophil

Natural killer cell

Dendritic cell

14 / 40

The primary function of neutrophils is to:

Present antigens

Produce antibodies

Phagocytose bacteria

15 / 40

Which cells are primarily responsible for humoral immunity?

B cells

T cells

Macrophages

16 / 40

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

B cells

Dendritic cells

Natural killer cells

17 / 40

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

CD19

CD3

18 / 40

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

Antigen

Adjuvant

Antibody

19 / 40

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

CD8+ T cells

B cells

CD4+ T cells

20 / 40

Which cytokine is known for its antiviral properties?

Interleukin-1

Interferon

Tumor necrosis factor

21 / 40

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

Inhibit macrophages

Neutralize toxins

Promote T cell proliferation

22 / 40

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

B cells

Neutrophils

Natural killer cells

23 / 40

Which immunoglobulin is found in mucosal secretions?

IgM

IgA

IgD

24 / 40

Helper T cells express which surface marker?

CD4

CD8

CD3

25 / 40

The first line of defense against pathogens includes:

Skin and mucous membranes

Antibodies

T cells

26 / 40

Which cell is primarily responsible for the production of antibodies?

Dendritic cell

Macrophage

Plasma cell

27 / 40

Which cell type is primarily involved in allergic reactions?

Eosinophils

Neutrophils

Mast cells

28 / 40

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

Opsonization

Agglutination

Neutralization

29 / 40

Which complement component acts as an opsonin?

C5a

C3b

30 / 40

Which type of hypersensitivity involves T cell-mediated responses?

Type IV

Type I

Type II

31 / 40

The primary function of regulatory T cells is to:

Suppress immune responses

Activate B cells

Produce antibodies

32 / 40

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

Helper T cells

Cytotoxic T cells

B cells

33 / 40

The immunoglobulin primarily involved in allergic reactions is:

IgA

IgG

IgE

34 / 40

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

Cytotoxic T cells

B cells

Helper T cells

35 / 40

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

CD3

CD28

CD19

36 / 40

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

Chemotaxis

Diapedesis

Extravasation

37 / 40

Which immunoglobulin can cross the placenta?

IgM

IgG

IgA

38 / 40

Which of the following is a secondary lymphoid organ?

Bone marrow

Spleen

Thymus

39 / 40

The hypersensitivity reaction involving immune complexes is known as:

Type II

Type I

Type III

40 / 40

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

Hapten

Allergen

Epitope

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adminFebruary 26, 2024

0 22 2 minutes read