Cells and Organs of the Immune System
- Previous year questions on Cells and Organs of the Immune System for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Microbiology section of the exam.
- Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
- 41 live questions in Cells and Organs of the Immune System.
- Microbiology is worth about 20 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 5 Sept 2026.
Q1.The lineage-specific marker for B cells is
- ACD 19✓ Correct answer
- BCD 20
- CCD 21
- DCD 22
Q2.Antigen processing cells are all of the following, except:
- AAstrocytes
- BDendritic cells in lymphoid follicles✓ Correct answer
- CReticulum cells of lymph nodes
- DLangerhan's cells
Q3.The function common to neutrophils, monocyte & macrophages is -
- AImmune response
- BPhagocytosis✓ Correct answer
- CLiberation of histamine
- DDestruction of old erythrocytes
Q4.CD 3 receptor is seen in -
- AT cells✓ Correct answer
- BB cells
- CMacrophages
- DEosinophils
Q5.In an inflammatory response, macrophages are usually derived from -
- AMonocytes✓ Correct answer
- BReticuloendothelial cells
- CNeutrophils
- DLymphocytes
Q6.CD4 count in normal healthy adult is
- A500
- B200
- C1000✓ Correct answer
- D300
Q7.Nude Mouse is able to accept Xeno-Graft because they lack:
- AT cells✓ Correct answer
- BB-Cells
- CNK cells
- DLAK Cells
Q8.Lymphoreticular system does not include -
- AT-cells
- BB-cells
- CPlatelets✓ Correct answer
- DMacrophages
Q9.Virus infected cells are killed by -
- AMacrophages
- BComplement system
- CMHC II related cells
- DNK cells✓ Correct answer
Q10.Regarding NK cells, false statement is -
- Ait is activated by IL-2
- BExpresses CD 3 receptor✓ Correct answer
- CIt is a variant of large lymphocyte
- DThere is antibody induced proliferation of NK cells
Answer key
Q1: A. CD 19; Q2: B. Dendritic cells in lymphoid follicles; Q3: B. Phagocytosis; Q4: A. T cells; Q5: A. Monocytes; Q6: C. 1000; Q7: A. T cells; Q8: C. Platelets; Q9: D. NK cells; Q10: B. Expresses CD 3 receptor.
Other topics in Microbiology
- Principles of General Microbiology
- Immune System: Organisation, Function and Response
- Hypersensitivity
- Disorders of Immunity
- Streptococci and Enterococci
- Staphylococci
- Corynebacterium, Listeria and Actinomyces
- Clostridium and Bacillus
- Non-Sporing Anaerobes
- Mycobacterium Tuberculosis
- Mycobacteria Other Than Tuberculosis
- Escherichia, Proteus and Klebsiella
- Shigella and Salmonella
- Vibrio and Campylobacterales
- Pseudomonas and Burkholderiales
- Haemophilus
- Yersinia, Brucella, Bartonella and Legionella
- Gram-Negative Cocci
- Rickettsia, Chlamydia and Mycoplasma
- Spirochetes
- Virus Structure and General Properties
- DNA Viruses
- Hepatitis
- HIV
- Myxoviruses and Rhabdoviruses
- Arboviruses and Picornaviruses
- Rubella, Coronaviruses, Prions, Rotavirus, Filovirus, Zika Virus and Nipah Virus
- Superficial and Systemic Fungal Infections
- Opportunistic Fungal Infections
- Principles of Parasitology
- Protozoa: Amoebae, Ciliates and Flagellates
- Protozoa: Sporozoa
- Helminths: Cestodes and Trematodes
- Helminths: Nematodes
- Applied Clinical Microbiology