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 / 30Histamine release is most closely associated with which immune response? Inflammation Autoimmunity Allergy Antibody production 2 / 30Clonal selection refers to: Generation of T cell receptors Removal of self-reactive lymphocytes Expansion of specific lymphocytes after antigen recognition Natural killer cell activation 3 / 30Toll-like receptors (TLRs) are part of which immune system?Adaptive Adaptive Passive Innate Humoral 4 / 30Which of the following is NOT an antigen-presenting cell? Erythrocyte B cell Macrophage Dendritic cell 5 / 30Which cell surface marker is found on all helper T cells? CD56 CD8 CD4 CD19 6 / 30Which molecule is crucial for T-cell activation along with the TCR–MHC interaction? CD40 IgE CD19 CD28 7 / 30What is the primary function of the immune system? Defense against pathogens Hormone production Oxygen transport Digestion 8 / 30Which antibody is most abundant in human serum? IgE IgG IgM IgA 9 / 30Which type of hypersensitivity is antibody-mediated cytotoxic? Type III Type II Type I Type IV 10 / 30What type of immunity is acquired through vaccination? Artificial active immunity Innate immunity Natural immunity Passive immunity 11 / 30The complement system enhances immunity by: Increasing T cell count Antigen production Cell apoptosis Opsonization and cell lysis 12 / 30Which pathway of complement activation requires antibodies? Classical Lytic Lectin Alternative 13 / 30Which transcription factor is activated by NF-κB in immune signaling? p53 MyD88 NF-κB itself STAT6 14 / 30Which of the following immunoglobulins can cross the placenta? IgG IgA IgE IgM 15 / 30Which of these cells produces antibodies? Plasma cells T cells Macrophages Dendritic cells 16 / 30Which is a feature of a secondary immune response? Faster and stronger antibody production Slow onset IgM predominance Low antibody titers 17 / 30Which of the following best describes antigenic drift? Sudden, major changes in antigen Minor mutations over time Immune memory loss Inactivation of antigen 18 / 30Which of the following is a component of the innate immune system? T cells Antibodies Memory B cells Natural killer (NK) cells 19 / 30What is the function of the J chain in immunoglobulins? Joins monomers of IgA and IgM Inhibits antibody function Enhances Fc receptor binding Breaks down antigens 20 / 30Which is a function of Regulatory T cells (Tregs)? Present antigens Suppress immune response Stimulate inflammation Kill infected cells 21 / 30The process of central tolerance occurs in the: Liver Thymus and bone marrow Peripheral lymph nodes Bloodstream 22 / 30Which immunoglobulin is primarily involved in mucosal immunity? IgG IgM IgA IgE 23 / 30Which immunoglobulin appears first during a primary immune response? IgG IgE IgM IgA 24 / 30The term "opsonization" refers to: Coating of pathogens to enhance phagocytosis Antibody switching Lymphocyte apoptosis Antigen destruction by acid 25 / 30MHC class I molecules present antigens to: B cells Macrophages CD8+ T cells CD4+ T cells 26 / 30Which cytokine is primarily responsible for fever? IFN-gamma IL-1 IL-10 IL-4 27 / 30Which of the following diseases is an example of autoimmunity? HIV/AIDS Asthma Tuberculosis Rheumatoid arthritis 28 / 30Which interleukin is known as the "T cell growth factor"? IL-6 IL-2 IL-10 IL-1 29 / 30Phagocytosis is carried out primarily by: B cells Macrophages T-helper cells Mast cells 30 / 30Which organ is responsible for the maturation of T lymphocytes? Thymus Liver Spleen Bone marrow Your score isThe average score is 53% 0% Restart quiz
