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GS Paper IUPSC Prelims 2000
Health & Medicine
Question No. 481Interactive Test Mode
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+2-0.66

Q481. At which stage in its life cycle, does the silkworm yield the fibre of commerce?

At which stage in its life cycle, does the silkworm yield the fibre of commerce?

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 2000 • Science and Technology

Correct Answer: Option (B) — Larva

Concept & Option Breakdown

Standard Reference Verified

• Option (b) is correct: The commercial silk thread is produced and spun by the silkworm during its larval stage (caterpillar) just prior to pupation, when its salivary/silk glands secrete fibroin and sericin to construct the protective cocoon.

Elimination Heuristic & Exam Approach

The silkworm larva (caterpillar) spins the silk cocoon around itself before transforming into a pupa.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2000 (Q481)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (B) — Larva

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Frequently Asked Questions — UPSC Prelims 2000 Q481

What is the official answer for UPSC Prelims 2000 GS Paper I Question 481 (Science and Technology)?

The official UPSC answer key for this 2000 Science and Technology (Health & Medicine) question is Option (B): "Larva". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2000 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 silkworm larva (caterpillar) spins the silk cocoon around itself before transforming into a pupa.

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