Home/MDCAT/MDCAT Biology Immunity Online Test

MDCAT Biology Immunity Online Test

Mustansar KhanLast Updated: June 14, 2025

MDCAT Biology Immunity Test

MDCAT Biology Immunity Chaper 12 Online Test

Total Questions:	49
Time Allowed:	25 Minutes
Total Marks:	49
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	MDCAT Entry Test Biology Online Test Interview Questions about Biology All Universities Entrance Test Recruitments Tests

MDCAT Biology Immunity MCQS Online Test

Please wait...

Page 1 of 2

Uncategorized

1. Which part of the body produces B and T cells?

Bone marrow

Lymph nodes

Liver

Spleen

2. Which type of immunity involves T cells attacking infected cells?

Passive immunity

Innate immunity

Humoral immunity

Cell-mediated immunity

3. Which antibody class is the most abundant in the bloodstream?

IgE

IgG

IgA

IgD

4. What do antigens bind to on lymphocytes?

Enzymes

Ribosomes

Hormones

Receptors

5. Which cells are primarily responsible for the specific immune response?

Platelets

Neutrophils

Lymphocytes

Red blood cells

6. What initiates the production of specific antibodies?

Complement proteins

Inflammation

Exposure to antigens

White blood cell count

7. What type of molecule is an antibody?

Nucleic acid

Protein

Lipid

Carbohydrate

8. Which type of T cell suppresses the immune response?

Memory T cell

Cytotoxic T cell

Regulatory T cell

T-helper cell

9. Which of the following types of T cells directly kill infected host cells?

Memory T cells

Regulatory T cells

Cytotoxic T cells

Helper T cells

10. Which of the following is the first antibody produced during an immune response?

IgE

IgM

IgA

IgG

11. Which antibody is involved in allergic reactions?

IgM

IgG

IgE

IgA

12. What is the role of cytotoxic T cells?

Activate B cells

Suppress immune response

Produce antibodies

Kill virus-infected and cancerous cells

13. What is clonal selection in immunity?

Production of immune cells in the bone marrow

Activation and proliferation of specific lymphocytes

Inflammation of infected tissues

Destruction of non-specific cells

14. Which immune cells are responsible for immunological memory?

Neutrophils

Natural killer cells

Dendritic cells

Memory B and T cells

15. What do T-helper cells primarily do?

Produce antibodies

Destroy infected cells

Suppress immune response

Activate B cells and cytotoxic T cells

16. What is the main function of plasma cells?

Engulf bacteria

Produce antibodies

Kill infected cells

Store memory

17. Which structure displays antigens on infected cells?

MHC molecules

Ribosomes

Complement proteins

Histamines

18. Which antibody is mainly found in secretions like saliva and tears?

IgA

IgG

IgM

IgE

19. Which of the following provides passive immunity?

Memory cell activation

Vaccines

T cell activation

Antibodies from another organism

20. What is the key feature of the adaptive immune system?

Inflammation

Non-specific barriers

Speed

Memory and specificity

21. Which cells are responsible for antibody production?

Helper T cells

Natural killer cells

Plasma cells

Cytotoxic T cells

22. Which cells present antigens to activate specific immune responses?

Plasma cells

Red blood cells

Antigen-presenting cells

Memory cells

23. Which structure on an antibody allows it to bind to a specific antigen?

Heavy chain

Constant region

Variable region

Light chain

24. Which of the following best describes an antigen?

A white blood cell

A chemical produced by T cells

A molecule that triggers an immune response

A type of antibody

25. What is immune tolerance?

Inability to produce antibodies

Attack on foreign cells

Resistance to all pathogens

Ability to ignore self-antigens

Page 2 of 2

26. Where do T lymphocytes mature?

Thymus gland

Lymph nodes

Bone marrow

Spleen

27. What type of immunity results from a vaccination?

Artificial passive immunity

Artificial active immunity

Natural active immunity

Natural passive immunity

28. Which of the following is NOT a characteristic of specific defense?

Memory

Rapid initial response

Self/non-self recognition

Antigen specificity

29. Which of the following cells do not belong to the specific defense system?

Helper T cells

Macrophages

Plasma cells

Memory B cells

30. How do memory cells enhance the immune response?

By recognizing pathogens quickly

By destroying pathogens directly

By secreting enzymes

By producing mucus

31. What is the main function of B lymphocytes in the immune system?

Engulf pathogens

Attack infected cells directly

Produce histamines

Produce antibodies

32. Which is an example of naturally acquired active immunity?

Injection of antibodies

Antibiotic use

Recovery from chickenpox

Vaccination

33. Which immune response is faster and stronger upon second exposure to the same antigen?

Passive immune response

Primary immune response

Innate immune response

Secondary immune response

34. What is the function of memory cells?

Suppress immune responses

Produce histamine

Engulf pathogens

Recognize and respond quickly to previously encountered antigens

35. Which of the following is a characteristic of the specific immune response?

It is always stronger than innate immunity

It targets any foreign substance

It has memory and specificity

It acts immediately

36. Which part of the immune system is trained to avoid attacking the body’s own cells?

B cells

Macrophages

T cells

Natural killer cells

37. What is a vaccine?

A preparation containing antigens

A type of antibody

A strong antibiotic

A hormone that boosts immunity

38. Which of the following is true about the specific immune response?

It lacks precision

It acts the same against all pathogens

It involves antigen recognition

It cannot form memory

39. What happens after antigen binding to a B cell receptor?

Suppression of immunity

Destruction of the B cell

Cell death

Activation and differentiation into plasma cells

40. Which of the following produces interleukins?

T-helper cells

Red blood cells

B cells

Macrophages only

41. Which immune cells mature in the thymus?

T cells

Macrophages

Neutrophils

B cells

42. Which organ is primarily involved in filtering blood and initiating immune responses?

Thymus

Kidney

Spleen

Liver

43. Which type of immunity is provided by antibodies produced by B cells?

Innate immunity

Passive immunity

Cell-mediated immunity

Humoral immunity

44. What is an epitope?

A type of lymphocyte

A bacterial toxin

A white blood cell

A site on the antigen recognized by the immune system

45. Which cell type destroys cells displaying foreign antigens on their surface?

Cytotoxic T cell

Basophil

Memory B cell

Helper T cell

46. What allows antibodies to recognize specific antigens?

Their constant region

Their lipid membrane

Their variable region

Their carbohydrate chain

47. Which immune cell activates both humoral and cell-mediated immunity?

T-helper cell

Cytotoxic T cell

Natural killer cell

B cell

48. What is the term for a long-lasting immune response following recovery from an infection?

Autoimmunity

Innate immunity

Active immunity

Passive immunity

49. Which of the following is a major function of antibodies?

Breaking down antigens directly

Suppressing white blood cells

Activating red blood cells

Neutralizing toxins and viruses

You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.

MDCAT Chemistry Gases Test Online
MDCAT Chemistry Industrial Chemistry Test Online
MDCAT Chemistry Aldehydes and Ketones Test Online
MDCAT Physics Alternating Current Test Online
MDCAT Physics Fluid Dynamics Test Online
MDCAT Physics Vactors And Equilibrium Test Online
MDCAT Chemistry Alcohols And Phenols Test Online
MDCAT Chemistry Alkyl Halides Test Online
MDCAT Biology Biotechnology Online Test
MDCAT Biology Homeostasis Online Test

Mustansar KhanLast Updated: June 14, 2025

Facebook Twitter Reddit WhatsApp Share via Email Print

MDCAT Biology Immunity Online Test

MDCAT Biology Immunity Test

MDCAT Biology Immunity Chaper 12 Online Test

MDCAT Biology Immunity MCQS Online Test

Uncategorized

You Might Also Like

Mustansar Khan

Leave a Reply Cancel reply

MDCAT Biology Immunity Test

MDCAT Biology Immunity Chaper 12 Online Test

MDCAT Biology Immunity MCQS Online Test

Uncategorized

You Might Also Like

Mustansar Khan

Your Related

MDCAT Biology Enzymes Online Test

MDCAT Biology Homeostasis Online Test

MDCAT English Direct and Indirect Narration Online Test 2

University of Medical and Dental College MDCAT 2025 Test Preparation

MDCAT Biology Evolution Test Online

Sharif Medical College Lahore Entry Test Result 2025 Answer Key

Leave a Reply Cancel reply