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GS Paper IUPSC Prelims 2014
Health & Medicine
Question No. 181Interactive Test Mode
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+2-0.66

Q181. Consider the following techniques/phenomena: 1. Budding and grafting in fruit plants 2. Cytoplasmic male sterility 3. Gene silencing Which of the above is/are used to create transgenic crops?

Consider the following techniques/phenomena:

  1. Budding and grafting in fruit plants
  2. Cytoplasmic male sterility
  3. Gene silencing Which of the above is/are used to create transgenic crops?
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 2014 • Science and Technology

Correct Answer: Option (B) — 2 and 3 only

Concept & Option Breakdown

Standard Reference Verified

Item 1 is incorrect: Budding and grafting are traditional horticultural propagation techniques that join plant tissues without modifying or inserting recombinant DNA.

Item 2 is correct: Cytoplasmic male sterility (CMS) systems, including transgenic/engineered CMS systems, are utilized in genetic modification and hybrid crop breeding.

Item 3 is correct: Gene silencing techniques (such as RNA interference - RNAi) are central biotechnological tools used to produce transgenic plants with targeted trait expression or pest resistance.

Elimination Heuristic & Exam Approach

Grafting is an ancient vegetative propagation method, not a recombinant DNA or transgenic technique. Eliminating 1 leaves (b) and (d).

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2014 (Q181)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (B) — 2 and 3 only

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Frequently Asked Questions — UPSC Prelims 2014 Q181

What is the official answer for UPSC Prelims 2014 GS Paper I Question 181 (Science and Technology)?

The official UPSC answer key for this 2014 Science and Technology (Health & Medicine) question is Option (B): "2 and 3 only". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2014 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?

Grafting is an ancient vegetative propagation method, not a recombinant DNA or transgenic technique. Eliminating 1 leaves (b) and (d).

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