Free Biology MCQs Mock Test Online with Answers

Q1 : What is vaccine efficacy?

A: The ability of a vaccine to prevent disease in a controlled setting B: The ability of a vaccine to prevent disease in a real-world setting C: The ability of a vaccine to reduce disease severity D: The ability of a vaccine to eliminate pathogens

Q2 : What is the name of the immune disorder characterized by an abnormal production of complement proteins?

A: Complement deficiency B: Complement excess C: Complement dysregulation D: All of the above

Q3 : What is the role of antibodies in autoimmune diseases?

A: To eliminate self-reactive T cells B: To activate T cells C: To provide passive immunity D: To stimulate the immune system

Q4 : What is an antibody?

A: A protein produced by B cells in response to an antigen B: A protein produced by T cells in response to an antigen C: A protein produced by macrophages in response to an antigen D: A protein produced by dendritic cells in response to an antigen

Q5 : Which of the following is a symptom of lupus?

A: Joint pain and swelling B: Skin rash C: Fever D: All of the above

Q6 : What is the name of the immune disorder characterized by demyelination of nerve fibers?

A: Multiple sclerosis B: Lupus C: Rheumatoid arthritis D: Psoriasis

Q7 : What is IgM?

A: The first antibody produced in response to an antigen B: The most abundant antibody isotype in the blood C: The antibody responsible for mucosal immunity D: The antibody involved in allergic reactions

Q8 : What is the main function of IgG?

A: To provide long-term immunity against infections B: To activate complement and eliminate pathogens C: To bind to mast cells and basophils D: To activate T cells

Q9 : What is the process of clonal selection?

A: The activation of T cells by antigen-presenting cells B: The production of antibodies by B cells C: The proliferation of T cells and B cells D: The elimination of pathogens by phagocytes

Q10 : What is IgD?

A: The antibody involved in B cell activation B: The most abundant antibody isotype in the blood C: The first antibody produced in response to an antigen D: The antibody responsible for mucosal immunity

Q11 : What is the main function of IgM?

A: To provide immediate protection against infections B: To activate complement and eliminate pathogens C: To bind to mast cells and basophils D: To activate T cells

Q12 : Which vaccine is used to prevent diphtheria, pertussis, and tetanus?

A: DPT vaccine B: MMR vaccine C: Polio vaccine D: Hepatitis B vaccine

Q13 : Which of the following is a treatment for immunodeficiency?

A: Antibiotics B: Antivirals C: Immunoglobulin replacement therapy D: All of the above

Q14 : What is the name of the immune disorder characterized by an abnormal production of white blood cells?

A: Leukemia B: Lymphoma C: Myeloma D: All of the above

Q15 : Which of the following is a symptom of celiac disease?

A: Diarrhea B: Abdominal pain C: Fatigue D: All of the above

Q16 : Which vaccine is used to prevent human papillomavirus (HPV) infection?

A: Gardasil vaccine B: Cervarix vaccine C: Both a and b D: None of the above

Q17 : What is the name of the immune disorder characterized by inflammation of the joints?

A: Rheumatoid arthritis B: Lupus C: Multiple sclerosis D: Psoriasis

Q18 : What is the role of vaccine safety monitoring?

A: To detect and prevent adverse events B: To enhance the immune response C: To reduce the immune response D: To eliminate pathogens

Q19 : What is the most common route of vaccine administration?

A: Intramuscular B: Subcutaneous C: Oral D: Intradermal

Q20 : What is the binding site of an antibody?

A: The variable region B: The variable region C: The hinge region D: The Fc region

Q21 : Which of the following is a treatment for complement deficiency?

A: Complement replacement therapy B: Immunoglobulin replacement therapy C: Antibiotics D: Antivirals

Q22 : What is the name of the immune disorder characterized by an allergic reaction to gluten?

A: Celiac disease B: Rheumatoid arthritis C: Lupus D: Multiple sclerosis

Q23 : Which of the following is a symptom of immunodeficiency?

A: Recurrent infections B: Poor wound healing C: Fatigue D: All of the above

Q24 : What is the difference between monoclonal and polyclonal antibodies?

A: Monoclonal antibodies are produced by a single B cell, while polyclonal antibodies are produced by multiple B cells B: Monoclonal antibodies are produced by multiple B cells, while polyclonal antibodies are produced by a single B cell C: Monoclonal antibodies are specific for a single antigen, while polyclonal antibodies are specific for multiple antigens D: Monoclonal antibodies are used for therapeutic purposes, while polyclonal antibodies are used for diagnostic purposes

Q25 : What is the role of antibodies in the immune response?

A: To recognize and bind to specific antigens B: To activate T cells C: To produce cytokines D: To eliminate pathogens

Q26 : What is the process of antigen presentation?

A: The recognition of pathogens by T cells B: The activation of T cells by antigen-presenting cells C: The production of antibodies by B cells D: The elimination of pathogens by phagocytes

Q27 : What are the two main types of antibodies?

A: IgG and IgM B: IgA and IgE C: IgD and IgG D: IgM and IgA

Q28 : What is the role of antibodies in diagnostic tests?

A: To detect the presence of antigens B: To detect the presence of antibodies C: To eliminate pathogens D: To activate T cells

Q29 : What is vaccine effectiveness?

A: The ability of a vaccine to prevent disease in a real-world setting B: The ability of a vaccine to prevent disease in a controlled setting C: The ability of a vaccine to reduce disease severity D: The ability of a vaccine to eliminate pathogens

Q30 : What is the name of the immune disorder characterized by an impaired immune response?

A: Immunodeficiency B: Autoimmunity C: Hypersensitivity D: All of the above

Q31 : What is the main function of IgD?

A: To activate B cells B: To activate T cells C: To bind to mast cells and basophils D: To eliminate pathogens

Q32 : What is the main function of IgA?

A: To provide mucosal immunity B: To activate complement and eliminate pathogens C: To bind to mast cells and basophils D: To activate T cells

Q33 : Which vaccine is used to prevent measles, mumps, and rubella?

A: MMR vaccine B: DPT vaccine C: Polio vaccine D: Hepatitis A vaccine

Q34 : . What is IgE?

A: The antibody involved in allergic reactions B: The most abundant antibody isotype in the blood C: The first antibody produced in response to an antigen D: The antibody responsible for mucosal immunity

Q35 : What is the difference between a vaccine injury and a vaccine reaction?

A: A vaccine injury is a serious and potentially life-threatening response, while a vaccine reaction is a mild and temporary response B: A vaccine injury is a mild and temporary response, while a vaccine reaction is a serious and potentially life-threatening response C: A vaccine injury is a response to the vaccine, while a vaccine reaction is a response to the disease D: A vaccine injury is a response to the disease, while a vaccine reaction is a response to the vaccine

Q36 : Which of the following is a treatment for allergies?

A: Antihistamines B: Corticosteroids C: Immunotherapy D: All of the above

Q37 : What is the main function of antibodies?

A: To recognize and bind to specific antigens B: To activate T cells C: To produce cytokines D: To eliminate pathogens

Q38 : What is the name of the immune disorder characterized by an overactive immune response to allergens?

A: Allergy B: Asthma C: Atopy D: All of the above

Q39 : Which of the following is a symptom of cytokine storm?

A: Fever B: Fatigue C: Organ failure D: All of the above

Q40 : What is the role of the Vaccine Adverse Event Reporting System (VAERS)?

A: To monitor vaccine safety and detect adverse events B: To enhance the immune response C: To reduce the immune response D: To eliminate pathogens

Q41 : What is the main function of IgE?

A: To mediate allergic reactions B: To activate complement and eliminate pathogens C: To bind to mast cells and basophils D: To activate T cells

Q42 : What is the role of antibodies in therapeutic applications?

A: To eliminate pathogens B: To activate T cells C: To provide passive immunity D: To stimulate the immune system

Q43 : What is the structure of an antibody?

A: A Y-shaped protein composed of two heavy chains and two light chains B: A linear protein composed of one heavy chain and one light chain C: A globular protein composed of four heavy chains and four light chains D: A fibrous protein composed of two heavy chains and two light chains

Q44 : What is the role of antibodies in the immune response?

A: To recognize and bind to specific antigens B: To activate T cells C: To produce cytokines D: To eliminate pathogens

Q45 : What is the structure of an antibody?

A: A Y-shaped protein composed of two heavy chains and two light chains B: A linear protein composed of one heavy chain and one light chain C: A globular protein composed of four heavy chains and four light chains D: A fibrous protein composed of two heavy chains and two light chains

Q46 : What is the primary cause of immune disorders?

A: Genetic mutations B: Environmental factors C: Infections D: Autoimmunity

Q47 : What is a subunit vaccine?

A: A vaccine that contains a weakened form of the pathogen B: A vaccine that contains a killed form of the pathogen C: A vaccine that contains a portion of the pathogen D: A vaccine that contains a toxoid of the pathogen

Q48 : What is the main function of IgD?

A: To activate B cells B: To activate T cells C: To bind to mast cells and basophils D: To eliminate pathogens

Q49 : What is the main function of IgA?

A: To provide mucosal immunity B: To activate complement and eliminate pathogens C: To bind to mast cells and basophils D: To activate T cells

Q50 : What is a toxoid vaccine?

A: A vaccine that contains a weakened form of the pathogen B: A vaccine that contains a killed form of the pathogen C: A vaccine that contains a subunit of the pathogen D: A vaccine that contains a modified toxin

Q51 : What is the main function of antibodies?

A: To recognize and bind to specific antigens B: To activate T cells C: To produce cytokines D: To eliminate pathogens

Q52 : What is the role of antibodies in vaccine development?

A: To provide immediate protection against infections B: To provide long-term immunity against infections C: To activate T cells D: To eliminate pathogens

Q53 : What is the avidity of an antibody?

A: The overall binding strength of the antibody to the antigen B: The specificity of the antibody for the antigen C: The concentration of the antibody D: The concentration of the antigen

Q54 : What is IgG?

A: The most abundant antibody isotype in the blood B: The first antibody produced in response to an antigen C: The antibody responsible for mucosal immunity D: The antibody involved in allergic reactions

Q55 : What is the role of the Fab region of an antibody?

A: To bind to antigens B: To activate complement C: To bind to Fc receptors on immune cells D: To eliminate pathogens

Q56 : What is the name of the immune disorder characterized by an abnormal production of NOD-like receptors?

A: NLR deficiency B: NLR excess C: NLR dysregulation D: All of the above

Q57 : What is the name of the immune disorder characterized by an abnormal production of NOD-like receptors?

A: NLR deficiency B: NLR excess C: NLR dysregulation D: All of the above

Q58 : Which of the following is a type of hypersensitivity reaction?

A: Type I B: Type II C: Type III D: All of the above

Q59 : Which vaccine is used to prevent tuberculosis?

A: BCG vaccine B: MMR vaccine C: DPT vaccine D: Hepatitis B vaccine

Q60 : What is the antigen-binding site?

A: The region of the antibody that binds to the antigen B: The region of the antigen that binds to the antibody C: The region of the antibody that activates complement D: The region of the antigen that activates T cells

Q61 : What is a live attenuated vaccine?

A: A vaccine that contains a weakened form of the pathogen B: A vaccine that contains a killed form of the pathogen C: A vaccine that contains a subunit of the pathogen D: A vaccine that contains a toxoid of the pathogen

Q62 : What are the main cells involved in adaptive immunity?

A: T cells and B cells B: Neutrophils and macrophages C: Dendritic cells and natural killer cells D: All of the above

Q63 : What is the role of antibodies in cancer treatment?

A: To eliminate cancer cells B: To activate T cells C: To provide passive immunity D: To stimulate the immune system

Q64 : What is the process of immune tolerance?

A: The elimination of self-reactive T cells and B cells B: The activation of T cells and B cells C: The production of antibodies D: All of the above

Q65 : What is the role of cytokines in the immune response?

A: To activate T cells B: To activate B cells C: To recruit immune cells to the site of infection D: All of the above

Q66 : What is antibody engineering?

A: The process of designing and constructing antibodies B: The process of producing antibodies in the laboratory C: The process of modifying antibodies for therapeutic purposes D: The process of studying antibody structure and function

Q67 : What is IgM?

A: The antibody responsible for mucosal immunity B: The most abundant antibody isotype in the blood C: The first antibody produced in response to an antigen D: The antibody involved in allergic reactions

Q68 : What is the role of the Fc region of an antibody?

A: To bind to antigens B: To activate complement C: To bind to Fc receptors on immune cells D: To eliminate pathogens

Q69 : What is the difference between active and passive immunity?

A: Active immunity is produced by the body, while passive immunity is acquired from outside B: Active immunity is acquired from outside, while passive immunity is produced by the body C: Active immunity is specific, while passive immunity is non-specific D: Active immunity is long-term, while passive immunity is short-term

Q70 : What is cell-mediated immunity?

A: The activation of T cells B: The production of antibodies by B cells C: The production of cytokines by T cells D: The activation of natural killer cells

Q71 : . What is an immune disorder?

A: A condition where the immune system is overactive B: A condition where the immune system is underactive C: A condition where the immune system is impaired D: All of the above

Q72 : What is the affinity of an antibody?

A: The strength of binding between the antibody and antigen B: The specificity of the antibody for the antigen C: The concentration of the antibody D: The concentration of the antigen

Q73 : What are the two main types of antibodies?

A: IgG and IgM B: IgA and IgE C: IgD and IgG D: IgM and IgA

Q74 : What is the name of the immune disorder characterized by an abnormal production of antibodies?

A: Gammaglobulinemia B: Agammaglobulinemia C: Hypergammaglobulinemia D: All of the above

Q75 : What is an autoimmune disease?

A: A disease in which the immune system attacks self-antigens B: A disease in which the immune system is deficient C: A disease in which the immune system is overactive D: A disease in which the immune system is normal

Q76 : What is the name of the immune disorder characterized by an abnormal production of inflammasomes?

A: Inflammasome deficiency B: Inflammasome excess C: Inflammasome dysregulation D: All of the above

Q77 : What is the process of immune tolerance?

A: The elimination of self-reactive T cells and B cells B: The activation of T cells and B cells C: The production of antibodies D: The elimination of pathogens

Q78 : Which of the following is an example of an immunodeficiency disorder?

A: HIV/AIDS B: SCID C: CVID D: All of the above

Q79 : Which vaccine is used to prevent influenza?

A: Flu vaccine B: Pneumococcal vaccine C: Meningococcal vaccine D: Hepatitis A vaccine

Q80 : A condition where the immune system is impaired

A: Inflammasome deficiency B: Inflammasome excess C: Inflammasome dysregulation D: All of the above

Q81 : What is an inactivated vaccine?

A: A vaccine that contains a killed form of the pathogen B: A vaccine that contains a weakened form of the pathogen C: A vaccine that contains a subunit of the pathogen D: A vaccine that contains a toxoid of the pathogen

Q82 : Which of the following is a treatment for NLR deficiency?

A: NLR replacement therapy B: Immunoglobulin replacement therapy C: Antibiotics D: Antivirals

Q83 : What is the difference between a vaccine reaction and an adverse event?

A: A vaccine reaction is a mild and temporary response, while an adverse event is a serious and potentially life-threatening response B: A vaccine reaction is a serious and potentially life-threatening response, while an adverse event is a mild and temporary response C: A vaccine reaction is a serious and potentially life-threatening response, while an adverse event is a mild and temporary response D: A vaccine reaction is a response to the disease, while an adverse event is a response to the vaccine

Q84 : What is the main function of IgM?

A: To provide immediate protection against infections B: To activate complement and eliminate pathogens C: To bind to mast cells and basophils D: To activate T cells

Q85 : What is an antibody?

A: A protein produced by B cells in response to an antigen B: A protein produced by T cells in response to an antigen C: A protein produced by macrophages in response to an antigen D: A protein produced by dendritic cells in response to an antigen

Q86 : Which of the following is a treatment for NLR deficiency?

A: NLR replacement therapy B: Immunoglobulin replacement therapy C: Antibiotics D: Antivirals

Q87 : What is the difference between therapeutic and prophylactic antibodies?

A: Therapeutic antibodies are used to treat diseases, while prophylactic antibodies are used to prevent diseases B: Therapeutic antibodies are used to prevent diseases, while prophylactic antibodies are used to treat diseases C: Therapeutic antibodies are specific, while prophylactic antibodies are non-specific D: Therapeutic antibodies are long-term, while prophylactic antibodies are short-term

Q88 : What is the main function of IgG?

A: To provide long-term immunity against infections B: To activate complement and eliminate pathogens C: To bind to mast cells and basophils D: To activate T cells

Q89 : Which of the following is an example of an immune disorder?

A: Rheumatoid arthritis B: Lupus C: Multiple sclerosis D: All of the above

Q90 : Which of the following is a characteristic of autoimmune disorders?

A: The immune system attacks self-antigens B: The immune system is impaired C: The immune system is impaired D: All of the above

Q91 : What is IgD?

A: The antibody involved in B cell activation B: The most abundant antibody isotype in the blood C: The first antibody produced in response to an antigen D: The antibody responsible for mucosal immunity

Q92 : What is IgA?

A: The most abundant antibody isotype in the blood B: The antibody responsible for mucosal immunity C: The first antibody produced in response to an antigen D: The antibody involved in allergic reactions

Q93 : What is the name of the immune disorder characterized by an abnormal production of toll-like receptors?

A: TLR deficiency B: TLR excess C: TLR dysregulation D: All of the above

Q94 : What is an immunodeficiency disease?

A: A disease in which the immune system is deficient B: A disease in which the immune system is overactive C: A disease in which the immune system attacks self-antigens D: A disease in which the immune system is normal

Q95 : What is a conjugate vaccine?

A: A vaccine that combines a weakened pathogen with a protein B: A vaccine that combines a killed pathogen with a protein C: A vaccine that combines a subunit of a pathogen with a protein D: A vaccine that combines a toxoid with a protein

Q96 : What is the role of memory cells in the immune response?

A: To provide long-term immunity B: To activate T cells C: To produce antibodies D: To eliminate pathogens

Q97 : What is the name of the immune disorder characterized by an abnormal production of cytokines?

A: Cytokine storm B: Cytokine deficiency C: Cytokine imbalance D: All of the above

Q98 : Which of the following is a symptom of TLR deficiency?

A: Recurrent infections B: Poor wound healing C: Fatigue D: All of the above

Q99 : What is IgE?

A: The antibody involved in allergic reactions B: The most abundant antibody isotype in the blood C: The first antibody produced in response to an antigen D: The antibody responsible for mucosal immunity

Q100 : What is the main function of IgE?

A: To mediate allergic reactions B: To activate complement and eliminate pathogens C: To bind to mast cells and basophils D: To activate T cells

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