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