Free Specific Defense Mechanism MCQs with Answers
114 Specific Defense Mechanism MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Specific defense mechanisms provide targeted immunity through B lymphocytes, T lymphocytes, antibodies and memory cells that recognize particular antigens. Questions cover humoral and cell mediated responses, clonal selection, primary and secondary immune responses, vaccination and passive immunity, while distinguishing adaptive defenses from the immediate, non specific innate response.
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114 questions · page 4 of 6
- A. Natural active
- B. Natural passive
- C. Artificial active
- D. Artificial passive
Explanation: The correct answer is artificial passive immunity. This type of immunity occurs when antibodies are directly introduced into the body…
Correct answer: Artificial passive- A. Active and natural
- B. Active and artificial
- C. Passive and natural
- D. Passive and artificial
Explanation: Active artificial immunity is acquired through vaccination but does not provide immediate protection as it requires time for the body to…
Correct answer: Active and artificial- A. Innate immunity
- B. Passive immunity
- C. Primary response
- D. Secondary response
Explanation: Secondary response is faster and stronger due to memory cells.
Correct answer: Secondary response- A. Natural active
- B. Artificial active
- C. Natural passive
- D. Artificial passive
Explanation: Artificial active immunity is the foundation for vaccination. It involves the activation of adaptive immunity through the deliberate…
Correct answer: Artificial active- A. Antibiotic
- B. Pain killers
- C. Vaccine
- D. Sedatives
Explanation: Since people cannot naturally acquire immunity to tetanus, the best way to prevent tetanus is to vaccinate your patients.
Correct answer: Vaccine- A. Measles
- B. Hepatitis
- C. Diphtheria
- D. Polio
Explanation: They should get one dose at each of the following ages: 2 months old, 4 months old, 6 through 18 months old, and 4 through 6 years old.
Correct answer: Polio- A. Fetus receiving antibodies of mother through the placenta
- B. Mother receiving antibodies
- C. Baby receiving MMR shots
- D. Prevention of a disease due to previous infection
Explanation: Artificial active immunity involves the introduction of a vaccine (e.g., MMR shots) containing weakened or inactivated pathogens or their…
Correct answer: Baby receiving MMR shots- A. Homeostatic Response
- B. Primary Immune Response
- C. Behavioral Response
- D. Cell-mediated Response
Explanation: Transplant rejection is caused primarily by a cell-mediated immune response to HLA antigens expressed on donor antigen-presenting cells…
Correct answer: Cell-mediated Response- A. Neutrophils
- B. Monocytes
- C. B-Lymphocytes
- D. T-Lymphocytes
Explanation: B lymphocytes produce antibodies as part of humoral immunity.
Correct answer: B-Lymphocytes- A. Cell-mediated response
- B. Humoral immune response
- C. Active immunity
- D. Passive immunity
Explanation: T lymphocytes recognize an antigen and then attack microorganisms and the connection to it.
Correct answer: Cell-mediated response- A. Activation of killer T lymphocytes by infected cells
- B. Cloning of B lymphocytes to form plasma cells
- C. Ingestion of a bacterial cell by a neutrophil
- D. Presentation of antigen on the cell surface of macrophages
Explanation: c) Ingestion of a bacterial cell by a neutrophil:This option describes a non-specific immune response.
Correct answer: Ingestion of a bacterial cell by a neutrophil- A. A chemical that causes muscle hypertrophy
- B. A bacteria
- C. A foreign substance that produces an immune response
- D. A substance that causes a monocyte to transform into a macrophage
- E. A substance that agglutinates bacteria and marks them for phagocytosis
Explanation: Explanation for this question will be added soon.
Correct answer: A foreign substance that produces an immune response- A. Self against antigens
- B. Antigen against self
- C. Self against self
- D. Antigen destroyed
Explanation: Autoimmune disease occurs when a specific adaptive immune response is mounted against self antigens.
Correct answer: Self against self- A. Belong to cytokines
- B. Activate natural killer cells
- C. Activate immune cells
- D. Secrete interleukin
Explanation: Interferons (IFNs) are a broad class of cytokines that are part of your natural defenses.
Correct answer: Secrete interleukin- A. Interfere with pathogenic colonization
- B. Develop resistance against antigens
- C. Develop resistance against physical agents
- D. Produce antibiotic against pathogens
Explanation: Bacterial flora is beneficial because it prevents colonisation by pathogens by competing for attachment & nutrients.
Correct answer: Interfere with pathogenic colonization- A. Radiotherapy
- B. Chemotherapy
- C. Vaccination
- D. Antibiotics
Explanation: Acquired immunity comes from vaccines and exposure to diseases. These enable the body to develop antigens that can help it fight the same…
Correct answer: Vaccination- A. Neutralizing an antigen
- B. Precipitating an antigen
- C. Secreting cytokines
- D. Enhancing phagocytosis
Explanation: Antibody cells do not secrete many cytokines upon activation.
Correct answer: Secreting cytokines- A. Neutralizing an antigen
- B. Precipitating an antigen
- C. Secretion of cytokines
- D. Enhancing phagocytosis
Explanation: Antibodies primarily work by neutralizing antigens, precipitating antigens, and enhancing phagocytosis.
Correct answer: Secretion of cytokines- A. Monocytes
- B. Lymphocytes
- C. Neutrophils
- D. Thrombocytes
Explanation: Lymphocytes are white blood cells that are also one of th·e body's main types of immune cells.
Correct answer: Lymphocytes- A. Natural passive immunity
- B. Natural active immunity
- C. Acquired/Artificial active immunity
- D. Acquired/Artificial passive immunity
Explanation: Vaccination involves introducing antibodies (acquired) or antibodies-producing agents (artificial) into the body to provide active immunity.
Correct answer: Acquired/Artificial active immunity