Topic: Immunology basics and vaccines· Biology and Human Welfare

In higher vertebrates, the immune system can distinguish self-cells and non-self. If this property is lost due to genetic abnormality and it attacks self-cells, then it leads to :

1. Allergic response

2. Graft rejection

3. Auto-immune disease

4. Active immunity

Doubtly Asked 30 Oct 2026 NEET UG 2016 Phase 1 Practice test neet Save WhatsApp Report

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Answer: 3. Auto-immune disease

Key idea: When the immune system attacks the body's own cells, it is an auto-immune disease.

Examples are rheumatoid arthritis and type 1 diabetes. Allergy is an over-response to an external antigen, graft rejection is a response to foreign tissue, and active immunity means making your own antibodies after exposure.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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In higher vertebrates, the immune system can distinguish self-cells and non-self. If this property is lost due to genetic abnormality and it attacks self-cells, then it leads to :

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