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GS Paper IUPSC Prelims 2019
Health & Medicine
Question No. 52Interactive Test Mode
00:00
+2-0.66

Q52. What is Cas9 protein that is often mentioned in the news?

What is Cas9 protein that is often mentioned in the news?

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 2019 • Science and Technology

Correct Answer: Option (A) — A molecular scissors used in targeted gene editing

Concept & Option Breakdown

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Cas9 (CRISPR-associated protein 9) is an RNA-guided endonuclease enzyme that acts as 'molecular scissors'. Guided by a guide RNA (gRNA), it creates double-stranded breaks at specific target DNA sequences, forming the core component of the CRISPR-Cas9 genome editing tool.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2019 (Q52)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (A) — A molecular scissors used in targeted gene editing

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Frequently Asked Questions — UPSC Prelims 2019 Q52

What is the official answer for UPSC Prelims 2019 GS Paper I Question 52 (Science and Technology)?

The official UPSC answer key for this 2019 Science and Technology (Health & Medicine) question is Option (A): "A molecular scissors used in targeted gene editing". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2019 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?

To solve Health & Medicine questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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