Unit 4B: Immune System — Online MCQ Test
ZOOLOGY · CLASS 12 INTERMEDIATE 2 YEAR · Telangana State Board
Practice Unit 4B: Immune System with a free chapter-wise online MCQ test.
This chapter covers: This chapter details innate adaptive immunity lymphoid organs antigen-antibody interactions structural immunoglobulin classes cell-mediated immunity humoral response and vaccines..
AI-generated questions from basic to board-exam level, with instant results and explanations.
Unit 4B: Immune System — Important Questions & Answers
Which of the following is an example of an innate immune barrier?
- A. Antibody production
- B. Skin
- C. Memory cell formation
- D. Vaccination
Answer: B. Skin
Skin is a physical barrier and part of innate immunity. It provides immediate, non-specific protection against pathogens.
Skin is a physical barrier and part of innate immunity. It provides immediate, non-specific protection against pathogens.
Which lymphoid organ is the site of maturation of T-lymphocytes?
- A. Thymus
- B. Spleen
- C. Tonsils
- D. Lymph node
Answer: A. Thymus
T-lymphocytes mature in the thymus. It is a primary lymphoid organ responsible for T-cell development.
T-lymphocytes mature in the thymus. It is a primary lymphoid organ responsible for T-cell development.
Which of the following is a secondary lymphoid organ?
- A. Bone marrow
- B. Thymus
- C. Spleen
- D. Liver
Answer: C. Spleen
The spleen is a secondary lymphoid organ where immune responses are initiated. Bone marrow and thymus are primary lymphoid organs.
The spleen is a secondary lymphoid organ where immune responses are initiated. Bone marrow and thymus are primary lymphoid organs.
A child suffering from repeated infections is found to have deficiency of B-lymphocytes. Which immune function will be most affected?
- A. Humoral immunity
- B. Cell-mediated immunity
- C. Innate immunity
- D. Inflammatory response only
Answer: A. Humoral immunity
B-lymphocytes are responsible for humoral immunity by producing antibodies. Their deficiency mainly affects antibody-mediated defense.
B-lymphocytes are responsible for humoral immunity by producing antibodies. Their deficiency mainly affects antibody-mediated defense.
A patient receives an antiserum containing ready-made antibodies after snake bite. This is an example of:
- A. Active immunity
- B. Passive immunity
- C. Artificially acquired active immunity
- D. Natural active immunity
Answer: B. Passive immunity
Antiserum provides pre-formed antibodies, so the body does not produce them itself. This is passive immunity and gives immediate protection.
Antiserum provides pre-formed antibodies, so the body does not produce them itself. This is passive immunity and gives immediate protection.