Immunology Quiz

Step into the world of microbiology with our interactive quizzes! Whether you're a student, researcher, or curious learner, our topic-based quizzes are a fun and effective way to:

✅ Reinforce your learning

✅ Challenge your understanding

✅ Identify areas for improvement

✅ Earn appreciation for high scores

📝 Register to Start the Quiz

Please provide your full name and email address to access the quiz

NameEmail

1 / 20

Which cell is responsible for producing antibodies?

B cells

Macrophages

T cells

Neutrophils

2 / 20

Which MHC molecule presents endogenous (intracellular) antigens to CD8+ T cells?

MHC Class I

MHC Class II

MHC Class III

MHC DQ

3 / 20

Hypersensitivity reactions are classified into how many types?

4 / 20

Which class of immunoglobulin is the first to appear in response to an antigen?

IgA

IgG

IgM

IgE

5 / 20

Which transcription factor is crucial for regulatory T cell (Treg) development?

RORγt

T-bet

Foxp3

GATA-3

6 / 20

Hypersensitivity reactions are classified into how many types?

7 / 20

Which of the following cells are antigen-presenting cells (APCs)?

B cells

T helper cells

All of the above

Dendritic cells

8 / 20

The main function of the invariant chain (Ii) in MHC Class II antigen processing is to:

Degrade antigens in endosomes

Facilitate antigen loading onto MHC I

Block the peptide-binding groove of MHC II in the ER

Help export peptides out of the ER

9 / 20

Activation-Induced Cytidine Deaminase (AID) is required for which immunological process?

Somatic hypermutation and class switch recombination

Complement activation

T cell receptor rearrangement

MHC class II antigen loading

10 / 20

Somatic hypermutation occurs in which part of the immune system?

Thymus

Bone marrow

Germinal centers of lymph nodes

Liver

11 / 20

Anergy in T cells is primarily caused by:

Presence of superantigens

Absence of antigen presentation

Antigen recognition without co-stimulatory signals

Excessive IL-2 production

12 / 20

Which molecule is critical for the migration of dendritic cells from peripheral tissues to lymph nodes?

IL-12

CCR7

CD40

CD80

13 / 20

Which of the following is a primary lymphoid organ?

Thymus

Lymph node

Spleen

Tonsils

14 / 20

The function of the immunological synapse formed between a T cell and an antigen-presenting cell includes:

Inhibition of antigen processing

Facilitation of TCR signaling and directed secretion

Blocking costimulatory signaling

Suppression of cytokine release

15 / 20

Which of the following immunoglobulin isotypes is most effective at activating the classical complement pathway?

IgA

IgM

IgE

IgG4

16 / 20

Which complement component is responsible for the membrane attack complex (MAC) formation?

C5b

C1q

C4a

C3b

17 / 20

Which cytokine is mainly involved in the induction of fever?

IL-1

TNF-α

IL-10

IL-6

18 / 20

Passive immunity is best exemplified by:

Vaccination

Infection recovery

T-cell activation

Maternal antibodies to the baby

19 / 20

Which of the following cells are essential for the formation of germinal centers in lymph nodes?

Neutrophils

Follicular helper T (Tfh) cells

CD8+ T cells

Dendritic cells

20 / 20

Which of the following transcription factors is critical for the differentiation of Th1 cells?

RORγt

GATA3

T-bet

FoxP3

Your score is