Chapter 8: Immunology — Online MCQ Test
ZOOLOGY · CLASS 12th · Tamil Nadu State Board
Practice Chapter 8: Immunology with a free chapter-wise online MCQ test.
This chapter covers: This chapter investigates immune system components innate and adaptive immunity antigens antibodies hypersensitivity reactions autoimmune disorders and vaccine mechanisms..
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 8: Immunology — Important Questions & Answers
Which of the following is a part of the innate immune system?
- A. Antibody production
- B. Skin as a physical barrier
- C. Memory cell formation
- D. Specific antigen recognition by B cells
Answer: B. Skin as a physical barrier
Skin is a first-line defence and belongs to innate immunity. It provides a physical barrier against pathogen entry.
Skin is a first-line defence and belongs to innate immunity. It provides a physical barrier against pathogen entry.
Antibodies are also called:
- A. Antigens
- B. Immunoglobulins
- C. Interferons
- D. Lymphokines
Answer: B. Immunoglobulins
Antibodies are glycoproteins produced by plasma cells and are known as immunoglobulins.
Antibodies are glycoproteins produced by plasma cells and are known as immunoglobulins.
Which of the following is an example of passive immunity?
- A. Vaccination against polio
- B. Antibodies received from mother through placenta
- C. Production of antibodies after infection
- D. Formation of memory cells after disease
Answer: B. Antibodies received from mother through placenta
Passive immunity is obtained by receiving ready-made antibodies, such as maternal antibodies transferred through the placenta.
Passive immunity is obtained by receiving ready-made antibodies, such as maternal antibodies transferred through the placenta.
Which statement best distinguishes active immunity from passive immunity?
- A. Active immunity is immediate but short-lived
- B. Passive immunity is produced by the body after infection
- C. Active immunity involves the body producing its own antibodies
- D. Passive immunity always forms memory cells
Answer: C. Active immunity involves the body producing its own antibodies
In active immunity, the body itself responds to an antigen and produces antibodies and memory cells.
In active immunity, the body itself responds to an antigen and produces antibodies and memory cells.
In a patient with an autoimmune disorder, the immune system mainly:
- A. Ignores all foreign substances
- B. Attacks the body's own cells and tissues
- C. Produces only passive immunity
- D. Fails to produce any antibodies at all
Answer: B. Attacks the body's own cells and tissues
Autoimmune disorders occur when the immune system mistakenly recognizes self-tissues as foreign and attacks them.
Autoimmune disorders occur when the immune system mistakenly recognizes self-tissues as foreign and attacks them.