Immunology Quiz: Test Your Knowledge Immunology QuizChallenge your understanding of immunology with our carefully curated quiz covering foundational to advanced concepts. This interactive set of multiple-choice questions (MCQs) includes topics like innate and adaptive immunity, antibodies, antigen presentation, hypersensitivity reactions, and immune disorders. Perfect for students, competitive exam aspirants, and microbiology enthusiasts looking to revise or reinforce their knowledge. Start learning smarter with instant feedback and explanations on LearnMicrobiology.com! NameEmail 1 / 30Toll-like receptors (TLRs) are part of which immune system?Adaptive Adaptive Humoral Innate Passive 2 / 30Which immunoglobulin appears first during a primary immune response? IgG IgE IgA IgM 3 / 30Which of the following best describes antigenic drift? Inactivation of antigen Sudden, major changes in antigen Minor mutations over time Immune memory loss 4 / 30Which transcription factor is activated by NF-κB in immune signaling? MyD88 NF-κB itself STAT6 p53 5 / 30Which organ is responsible for the maturation of T lymphocytes? Liver Spleen Thymus Bone marrow 6 / 30Which of the following diseases is an example of autoimmunity? Rheumatoid arthritis HIV/AIDS Tuberculosis Asthma 7 / 30Which of the following is NOT an antigen-presenting cell? Erythrocyte B cell Dendritic cell Macrophage 8 / 30Clonal selection refers to: Natural killer cell activation Expansion of specific lymphocytes after antigen recognition Removal of self-reactive lymphocytes Generation of T cell receptors 9 / 30Which interleukin is known as the "T cell growth factor"? IL-1 IL-10 IL-2 IL-6 10 / 30Which of these cells produces antibodies? Plasma cells Macrophages Dendritic cells T cells 11 / 30Which pathway of complement activation requires antibodies? Alternative Lectin Classical Lytic 12 / 30What is the primary function of the immune system? Digestion Defense against pathogens Hormone production Oxygen transport 13 / 30Which is a feature of a secondary immune response? Low antibody titers IgM predominance Slow onset Faster and stronger antibody production 14 / 30MHC class I molecules present antigens to: B cells Macrophages CD4+ T cells CD8+ T cells 15 / 30Which immunoglobulin is primarily involved in mucosal immunity? IgE IgG IgA IgM 16 / 30Which cell surface marker is found on all helper T cells? CD4 CD56 CD19 CD8 17 / 30Which molecule is crucial for T-cell activation along with the TCR–MHC interaction? CD28 IgE CD40 CD19 18 / 30Which antibody is most abundant in human serum? IgA IgE IgG IgM 19 / 30Which is a function of Regulatory T cells (Tregs)? Kill infected cells Stimulate inflammation Present antigens Suppress immune response 20 / 30Which of the following immunoglobulins can cross the placenta? IgE IgA IgM IgG 21 / 30What is the function of the J chain in immunoglobulins? Joins monomers of IgA and IgM Enhances Fc receptor binding Inhibits antibody function Breaks down antigens 22 / 30The term "opsonization" refers to: Coating of pathogens to enhance phagocytosis Lymphocyte apoptosis Antibody switching Antigen destruction by acid 23 / 30The process of central tolerance occurs in the: Peripheral lymph nodes Liver Bloodstream Thymus and bone marrow 24 / 30Which of the following is a component of the innate immune system? Natural killer (NK) cells Memory B cells Antibodies T cells 25 / 30Histamine release is most closely associated with which immune response? Autoimmunity Antibody production Inflammation Allergy 26 / 30Which cytokine is primarily responsible for fever? IL-1 IFN-gamma IL-4 IL-10 27 / 30Phagocytosis is carried out primarily by: Macrophages Mast cells T-helper cells B cells 28 / 30What type of immunity is acquired through vaccination? Artificial active immunity Innate immunity Natural immunity Passive immunity 29 / 30The complement system enhances immunity by: Increasing T cell count Opsonization and cell lysis Cell apoptosis Antigen production 30 / 30Which type of hypersensitivity is antibody-mediated cytotoxic? Type IV Type I Type II Type III Your score isThe average score is 52% 0% Restart quiz
