1. Which of the following is an example of artificial active
immunity?
A. Immunization with a vaccine
B. Passing of antibodies through the placenta
C. Natural infection with a pathogen
D. Transfer of antibodies from mother to child via breast milk
Answer: a) Immunization with a vaccine
Rationale: Artificial active immunity is obtained through
vaccination, where the immune system is exposed to a non-
virulent form of a pathogen, triggering an immune response.
2. What is the major function of interferons in the immune
system?
A. To activate complement proteins
B. To enhance phagocytosis
C. To interfere with viral replication
D. To produce antibodies
Answer: c) To interfere with viral replication
Rationale: Interferons are signaling proteins released by infected
cells that help prevent viral replication and spread by activating
nearby cells to resist infection.
,3. Which class of immunoglobulins is predominantly found in
mucosal areas such as the respiratory and gastrointestinal tracts?
A. IgM
B. IgE
C. IgA
D. IgG
Answer: c) IgA
Rationale: IgA is found in mucosal areas like the respiratory and
gastrointestinal tracts, where it plays a crucial role in mucosal
immunity by preventing pathogen entry.
4. Which of the following best describes the role of neutrophils?
A. Antigen presentation
B. Phagocytosis of pathogens
C. Production of antibodies
D. Activation of helper T cells
Answer: b) Phagocytosis of pathogens
Rationale: Neutrophils are the first responders to infection and are
involved in the phagocytosis and destruction of pathogens.
5. What does the MHC (Major Histocompatibility Complex)
molecule do?
, A. Binds to pathogens to neutralize them
B. Helps T cells recognize antigens
C. Produces antibodies
D. Activates the complement system
Answer: b) Helps T cells recognize antigens
Rationale: MHC molecules present antigens on the surface of
cells, allowing T cells to recognize and respond to specific
pathogens.
6. What type of immunity is provided by the transfer of antibodies
from one individual to another?
A. Active immunity
B. Passive immunity
C. Innate immunity
D. Artificial immunity
Answer: b) Passive immunity
Rationale: Passive immunity occurs when antibodies are
transferred from one individual to another, providing temporary
protection.
7. Which of the following is an example of passive immunity?
A. Immunization with a vaccine
B. Exposure to a pathogen resulting in immunity
immunity?
A. Immunization with a vaccine
B. Passing of antibodies through the placenta
C. Natural infection with a pathogen
D. Transfer of antibodies from mother to child via breast milk
Answer: a) Immunization with a vaccine
Rationale: Artificial active immunity is obtained through
vaccination, where the immune system is exposed to a non-
virulent form of a pathogen, triggering an immune response.
2. What is the major function of interferons in the immune
system?
A. To activate complement proteins
B. To enhance phagocytosis
C. To interfere with viral replication
D. To produce antibodies
Answer: c) To interfere with viral replication
Rationale: Interferons are signaling proteins released by infected
cells that help prevent viral replication and spread by activating
nearby cells to resist infection.
,3. Which class of immunoglobulins is predominantly found in
mucosal areas such as the respiratory and gastrointestinal tracts?
A. IgM
B. IgE
C. IgA
D. IgG
Answer: c) IgA
Rationale: IgA is found in mucosal areas like the respiratory and
gastrointestinal tracts, where it plays a crucial role in mucosal
immunity by preventing pathogen entry.
4. Which of the following best describes the role of neutrophils?
A. Antigen presentation
B. Phagocytosis of pathogens
C. Production of antibodies
D. Activation of helper T cells
Answer: b) Phagocytosis of pathogens
Rationale: Neutrophils are the first responders to infection and are
involved in the phagocytosis and destruction of pathogens.
5. What does the MHC (Major Histocompatibility Complex)
molecule do?
, A. Binds to pathogens to neutralize them
B. Helps T cells recognize antigens
C. Produces antibodies
D. Activates the complement system
Answer: b) Helps T cells recognize antigens
Rationale: MHC molecules present antigens on the surface of
cells, allowing T cells to recognize and respond to specific
pathogens.
6. What type of immunity is provided by the transfer of antibodies
from one individual to another?
A. Active immunity
B. Passive immunity
C. Innate immunity
D. Artificial immunity
Answer: b) Passive immunity
Rationale: Passive immunity occurs when antibodies are
transferred from one individual to another, providing temporary
protection.
7. Which of the following is an example of passive immunity?
A. Immunization with a vaccine
B. Exposure to a pathogen resulting in immunity
