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