NEET PYQs for Immune System with Solutions: Practice NEET Previous Year Questions

Updated on - Jan 19, 2026

Immune System is an important topic in the Biology section in NEET exam. Practising this topic will increase your score overall and make your conceptual grip on NEET exam stronger.

This article gives you a full set of NEET PYQs for Immune System with explanations for effective preparation. Practice of NEET Biology PYQs including Immune System questions regularly will improve accuracy, speed, and confidence in the NEET 2026 exam.

NEET PYQs for Immune System with Solutions

1.
Select the incorrect statement with respect to acquired immunity:
- Primary response is produced when our body encounters a pathogen for the first time.
- Anamnestic response is elicited on subsequent encounters with the same pathogen
- Anamnestic response is due to memory of first encounter
- Acquired immunity is non-specific type of defense present at the time of birth
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2.
During viral infection the protein formed in host cells to resist is:
- Interferone
- Antitoxin
- Antibody
- Histone
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3.
The interferons are
- antigen proteins
- antiviral proteins
- antibiotic proteins
- all of these.
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4.
Which of the following substances, if introduce in the blood stream, would cause coagulation, at the site of its introduction ?
- Fibrinogen
- Prothrombin
- Heparin
- Thromboplastin
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5.
Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections?
- Autoimmune response
- Cell-mediated immune response
- Hormonal immune response
- Physiological immune response
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