Kuby Immunology Exam Prep 2025–2026 | 220+
Verified Practice Questions with Correct Answers &
Detailed Rationales | Complete Test Bank & Study
Guide for Immunology, Microbiology, and Medical
Science Students
Question 1
What is the primary function of the immune system?
A) To protect the body from pathogens. (Correct Option)
B) To produce hormones
C) To regulate metabolism
D) To aid in digestion
Rationale:
The primary function of the immune system is to protect the body from pathogens,
including bacteria, viruses, and parasites.
Question 2
What type of immunity is provided by antibodies passed from mother to child?
A) Passive immunity. (Correct Option)
B) Active immunity
C) Innate immunity
D) Cellular immunity
Rationale:
Passive immunity is provided by antibodies transferred from mother to child, offering
temporary protection.
Question 3
Which cells are primarily responsible for the adaptive immune response?
A) T cells and B cells. (Correct Option)
B) Neutrophils
C) Macrophages
D) Natural killer cells
Rationale:
T cells and B cells are the key components of the adaptive immune response, providing
targeted protection against specific pathogens.
,Question 4
What is the role of antigen-presenting cells (APCs)?
A) To present antigens to T cells. (Correct Option)
B) To produce antibodies
C) To destroy pathogens directly
D) To release cytokines
Rationale:
Antigen-presenting cells (APCs) present antigens to T cells, initiating the adaptive
immune response.
Question 5
Which type of T cell is responsible for helping other immune cells?
A) Helper T cells (CD4+ T cells). (Correct Option)
B) Cytotoxic T cells (CD8+ T cells)
C) Regulatory T cells
D) Memory T cells
Rationale:
Helper T cells (CD4+ T cells) assist other immune cells by releasing cytokines and
enhancing the immune response.
Question 6
What is the primary function of antibodies?
A) To neutralize pathogens and toxins. (Correct Option)
B) To engulf and digest pathogens
C) To produce cytokines
D) To activate complement proteins
Rationale:
Antibodies primarily function to neutralize pathogens and toxins, marking them for
destruction by other immune cells.
Question 7
Which immune response is the first line of defense against pathogens?
,A) Innate immunity. (Correct Option)
B) Adaptive immunity
C) Humoral immunity
D) Cell-mediated immunity
Rationale:
Innate immunity is the first line of defense against pathogens, providing immediate but
non-specific protection.
Question 8
What is the primary role of cytokines in the immune response?
A) To regulate immune cell activity. (Correct Option)
B) To directly kill pathogens
C) To produce antibodies
D) To present antigens
Rationale:
Cytokines regulate immune cell activity, influencing the growth, differentiation, and
function of immune cells.
Question 9
What is the function of memory B cells?
A) To provide long-term immunity. (Correct Option)
B) To produce antibodies immediately
C) To present antigens to T cells
D) To differentiate into helper T cells
Rationale:
Memory B cells provide long-term immunity by responding quickly to subsequent
exposures to the same antigen.
Question 10
Which cells are involved in the destruction of virus-infected cells?
A) Cytotoxic T cells (CD8+ T cells). (Correct Option)
B) Helper T cells
C) B cells
D) Dendritic cells
, Rationale:
Cytotoxic T cells (CD8+ T cells) are responsible for identifying and destroying virus-
infected cells.
Question 11
What is the role of the complement system in immunity?
A) To enhance the ability of antibodies and phagocytes to clear pathogens. (Correct
Option)
B) To produce antibodies
C) To directly kill pathogens
D) To present antigens to T cells
Rationale:
The complement system enhances the ability of antibodies and phagocytes to clear
pathogens, promoting inflammation and opsonization.
Question 12
Which type of immunity is achieved through vaccination?
A) Active immunity. (Correct Option)
B) Passive immunity
C) Innate immunity
D) Natural immunity
Rationale:
Active immunity is achieved through vaccination, where exposure to a harmless form of
the pathogen stimulates an immune response.
Question 13
What is the main function of regulatory T cells?
A) To suppress the immune response. (Correct Option)
B) To activate B cells
C) To kill infected cells
D) To produce antibodies
Rationale:
Regulatory T cells suppress the immune response to maintain tolerance and prevent
autoimmune reactions.
Verified Practice Questions with Correct Answers &
Detailed Rationales | Complete Test Bank & Study
Guide for Immunology, Microbiology, and Medical
Science Students
Question 1
What is the primary function of the immune system?
A) To protect the body from pathogens. (Correct Option)
B) To produce hormones
C) To regulate metabolism
D) To aid in digestion
Rationale:
The primary function of the immune system is to protect the body from pathogens,
including bacteria, viruses, and parasites.
Question 2
What type of immunity is provided by antibodies passed from mother to child?
A) Passive immunity. (Correct Option)
B) Active immunity
C) Innate immunity
D) Cellular immunity
Rationale:
Passive immunity is provided by antibodies transferred from mother to child, offering
temporary protection.
Question 3
Which cells are primarily responsible for the adaptive immune response?
A) T cells and B cells. (Correct Option)
B) Neutrophils
C) Macrophages
D) Natural killer cells
Rationale:
T cells and B cells are the key components of the adaptive immune response, providing
targeted protection against specific pathogens.
,Question 4
What is the role of antigen-presenting cells (APCs)?
A) To present antigens to T cells. (Correct Option)
B) To produce antibodies
C) To destroy pathogens directly
D) To release cytokines
Rationale:
Antigen-presenting cells (APCs) present antigens to T cells, initiating the adaptive
immune response.
Question 5
Which type of T cell is responsible for helping other immune cells?
A) Helper T cells (CD4+ T cells). (Correct Option)
B) Cytotoxic T cells (CD8+ T cells)
C) Regulatory T cells
D) Memory T cells
Rationale:
Helper T cells (CD4+ T cells) assist other immune cells by releasing cytokines and
enhancing the immune response.
Question 6
What is the primary function of antibodies?
A) To neutralize pathogens and toxins. (Correct Option)
B) To engulf and digest pathogens
C) To produce cytokines
D) To activate complement proteins
Rationale:
Antibodies primarily function to neutralize pathogens and toxins, marking them for
destruction by other immune cells.
Question 7
Which immune response is the first line of defense against pathogens?
,A) Innate immunity. (Correct Option)
B) Adaptive immunity
C) Humoral immunity
D) Cell-mediated immunity
Rationale:
Innate immunity is the first line of defense against pathogens, providing immediate but
non-specific protection.
Question 8
What is the primary role of cytokines in the immune response?
A) To regulate immune cell activity. (Correct Option)
B) To directly kill pathogens
C) To produce antibodies
D) To present antigens
Rationale:
Cytokines regulate immune cell activity, influencing the growth, differentiation, and
function of immune cells.
Question 9
What is the function of memory B cells?
A) To provide long-term immunity. (Correct Option)
B) To produce antibodies immediately
C) To present antigens to T cells
D) To differentiate into helper T cells
Rationale:
Memory B cells provide long-term immunity by responding quickly to subsequent
exposures to the same antigen.
Question 10
Which cells are involved in the destruction of virus-infected cells?
A) Cytotoxic T cells (CD8+ T cells). (Correct Option)
B) Helper T cells
C) B cells
D) Dendritic cells
, Rationale:
Cytotoxic T cells (CD8+ T cells) are responsible for identifying and destroying virus-
infected cells.
Question 11
What is the role of the complement system in immunity?
A) To enhance the ability of antibodies and phagocytes to clear pathogens. (Correct
Option)
B) To produce antibodies
C) To directly kill pathogens
D) To present antigens to T cells
Rationale:
The complement system enhances the ability of antibodies and phagocytes to clear
pathogens, promoting inflammation and opsonization.
Question 12
Which type of immunity is achieved through vaccination?
A) Active immunity. (Correct Option)
B) Passive immunity
C) Innate immunity
D) Natural immunity
Rationale:
Active immunity is achieved through vaccination, where exposure to a harmless form of
the pathogen stimulates an immune response.
Question 13
What is the main function of regulatory T cells?
A) To suppress the immune response. (Correct Option)
B) To activate B cells
C) To kill infected cells
D) To produce antibodies
Rationale:
Regulatory T cells suppress the immune response to maintain tolerance and prevent
autoimmune reactions.
