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GS Paper IUPSC Prelims 2001
Health & Medicine
Question No. 474Interactive Test Mode
00:00
+2-0.66

Q474. Antigen is a substance which:

Antigen is a substance which:

Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2001 • Science and Technology

Correct Answer: Option (D) — stimulates formation of antibody

Concept & Option Breakdown

Standard Reference Verified

• Option (d) is correct: An antigen (antibody generator) is any foreign molecule capable of binding to specific immune receptors and triggering an adaptive immune response, leading to the production of specific antibodies by B-lymphocytes.

Elimination Heuristic & Exam Approach

The word 'Antigen' is a portmanteau of Antibody generator.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2001 (Q474)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (D) — stimulates formation of antibody

Related & Repeated Prelims PYQs (1)

Questions from other UPSC Prelims years testing the same or closely linked concept.

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1997 • Q50995% Match

Antigen is a substance which:

Science and Technology • Health & MedicineSolve

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Frequently Asked Questions — UPSC Prelims 2001 Q474

What is the official answer for UPSC Prelims 2001 GS Paper I Question 474 (Science and Technology)?

The official UPSC answer key for this 2001 Science and Technology (Health & Medicine) question is Option (D): "stimulates formation of antibody". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2001 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Health & Medicine UPSC Prelims question using option elimination?

The word 'Antigen' is a portmanteau of Antibody generator.

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Previous QuestionMatch List-I with List-II and select the correct answer using the codes given below: | List-I (Substance) | List-II (Physiological role) | | :--- | :--- | | A. Ptyalin | 1. Converts angiotensinogen in blood into angiotensin | | B. Pepsin | 2. Digests starch | | C. Renin | 3. Digests proteins | | D. Oxytocin | 4. Hydrolyses fats | | | 5. Induces contraction of smooth muscles | Codes:
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