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 / 30Clonal selection refers to: Removal of self-reactive lymphocytes Expansion of specific lymphocytes after antigen recognition Natural killer cell activation Generation of T cell receptors 2 / 30Which of the following is a component of the innate immune system? Memory B cells Natural killer (NK) cells Antibodies T cells 3 / 30Which type of hypersensitivity is antibody-mediated cytotoxic? Type II Type I Type IV Type III 4 / 30Which of the following immunoglobulins can cross the placenta? IgG IgM IgE IgA 5 / 30Which is a feature of a secondary immune response? Faster and stronger antibody production IgM predominance Low antibody titers Slow onset 6 / 30Which of the following diseases is an example of autoimmunity? Rheumatoid arthritis Asthma HIV/AIDS Tuberculosis 7 / 30What is the function of the J chain in immunoglobulins? Enhances Fc receptor binding Joins monomers of IgA and IgM Breaks down antigens Inhibits antibody function 8 / 30Which immunoglobulin is primarily involved in mucosal immunity? IgG IgE IgM IgA 9 / 30Which cytokine is primarily responsible for fever? IFN-gamma IL-4 IL-10 IL-1 10 / 30The process of central tolerance occurs in the: Bloodstream Peripheral lymph nodes Thymus and bone marrow Liver 11 / 30Which is a function of Regulatory T cells (Tregs)? Present antigens Suppress immune response Stimulate inflammation Kill infected cells 12 / 30Which interleukin is known as the "T cell growth factor"? IL-1 IL-10 IL-6 IL-2 13 / 30MHC class I molecules present antigens to: Macrophages B cells CD4+ T cells CD8+ T cells 14 / 30Phagocytosis is carried out primarily by: Macrophages T-helper cells Mast cells B cells 15 / 30Which molecule is crucial for T-cell activation along with the TCR–MHC interaction? IgE CD40 CD19 CD28 16 / 30Which antibody is most abundant in human serum? IgM IgG IgA IgE 17 / 30Which transcription factor is activated by NF-κB in immune signaling? MyD88 p53 NF-κB itself STAT6 18 / 30Toll-like receptors (TLRs) are part of which immune system?Adaptive Passive Adaptive Innate Humoral 19 / 30Which organ is responsible for the maturation of T lymphocytes? Bone marrow Liver Thymus Spleen 20 / 30Which of these cells produces antibodies? Plasma cells Macrophages Dendritic cells T cells 21 / 30Histamine release is most closely associated with which immune response? Antibody production Inflammation Allergy Autoimmunity 22 / 30The term "opsonization" refers to: Antigen destruction by acid Lymphocyte apoptosis Coating of pathogens to enhance phagocytosis Antibody switching 23 / 30Which of the following is NOT an antigen-presenting cell? Erythrocyte Dendritic cell B cell Macrophage 24 / 30What is the primary function of the immune system? Oxygen transport Digestion Defense against pathogens Hormone production 25 / 30Which cell surface marker is found on all helper T cells? CD8 CD19 CD4 CD56 26 / 30Which immunoglobulin appears first during a primary immune response? IgE IgM IgG IgA 27 / 30Which pathway of complement activation requires antibodies? Classical Alternative Lytic Lectin 28 / 30The complement system enhances immunity by: Opsonization and cell lysis Increasing T cell count Cell apoptosis Antigen production 29 / 30What type of immunity is acquired through vaccination? Artificial active immunity Natural immunity Innate immunity Passive immunity 30 / 30Which of the following best describes antigenic drift? Minor mutations over time Immune memory loss Sudden, major changes in antigen Inactivation of antigen Your score isThe average score is 36% 0% Restart quiz
