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 / 30Which molecule is crucial for T-cell activation along with the TCR–MHC interaction? IgE CD28 CD19 CD40 2 / 30Which organ is responsible for the maturation of T lymphocytes? Liver Thymus Bone marrow Spleen 3 / 30Which is a function of Regulatory T cells (Tregs)? Suppress immune response Present antigens Kill infected cells Stimulate inflammation 4 / 30Which immunoglobulin is primarily involved in mucosal immunity? IgG IgA IgE IgM 5 / 30What type of immunity is acquired through vaccination? Passive immunity Natural immunity Innate immunity Artificial active immunity 6 / 30Which of the following is a component of the innate immune system? Antibodies Memory B cells T cells Natural killer (NK) cells 7 / 30Histamine release is most closely associated with which immune response? Autoimmunity Inflammation Antibody production Allergy 8 / 30The process of central tolerance occurs in the: Bloodstream Liver Thymus and bone marrow Peripheral lymph nodes 9 / 30The complement system enhances immunity by: Increasing T cell count Antigen production Opsonization and cell lysis Cell apoptosis 10 / 30Which of the following immunoglobulins can cross the placenta? IgE IgG IgA IgM 11 / 30What is the function of the J chain in immunoglobulins? Inhibits antibody function Joins monomers of IgA and IgM Breaks down antigens Enhances Fc receptor binding 12 / 30Which pathway of complement activation requires antibodies? Lytic Alternative Lectin Classical 13 / 30Which of the following best describes antigenic drift? Inactivation of antigen Immune memory loss Sudden, major changes in antigen Minor mutations over time 14 / 30Which transcription factor is activated by NF-κB in immune signaling? p53 NF-κB itself STAT6 MyD88 15 / 30Which cytokine is primarily responsible for fever? IL-10 IL-1 IL-4 IFN-gamma 16 / 30Which antibody is most abundant in human serum? IgM IgG IgA IgE 17 / 30MHC class I molecules present antigens to: CD8+ T cells Macrophages CD4+ T cells B cells 18 / 30Which of these cells produces antibodies? Plasma cells T cells Dendritic cells Macrophages 19 / 30Which cell surface marker is found on all helper T cells? CD19 CD56 CD8 CD4 20 / 30Which immunoglobulin appears first during a primary immune response? IgA IgE IgM IgG 21 / 30Which interleukin is known as the "T cell growth factor"? IL-10 IL-2 IL-6 IL-1 22 / 30The term "opsonization" refers to: Antigen destruction by acid Antibody switching Lymphocyte apoptosis Coating of pathogens to enhance phagocytosis 23 / 30Toll-like receptors (TLRs) are part of which immune system?Adaptive Passive Adaptive Innate Humoral 24 / 30Clonal selection refers to: Expansion of specific lymphocytes after antigen recognition Natural killer cell activation Generation of T cell receptors Removal of self-reactive lymphocytes 25 / 30Which type of hypersensitivity is antibody-mediated cytotoxic? Type I Type IV Type III Type II 26 / 30Which of the following is NOT an antigen-presenting cell? Dendritic cell B cell Erythrocyte Macrophage 27 / 30Phagocytosis is carried out primarily by: Macrophages B cells T-helper cells Mast cells 28 / 30Which is a feature of a secondary immune response? Low antibody titers Faster and stronger antibody production Slow onset IgM predominance 29 / 30What is the primary function of the immune system? Hormone production Oxygen transport Defense against pathogens Digestion 30 / 30Which of the following diseases is an example of autoimmunity? Asthma Rheumatoid arthritis HIV/AIDS Tuberculosis Your score isThe average score is 64% 0% Restart quiz
