Acme Ai
A
अ
GS Paper IUPSC Prelims 2024
Biotechnology & Genetics
Question No. 2Interactive Test Mode
00:00
+2-0.66

Q2. Which one of the following is synthesised in the human body that dilates blood vessels and increases blood flow?

Which one of the following is synthesised in the human body that dilates blood vessels and increases blood flow?

Select the correct option below (or cross out options to eliminate)
PrevNext Question

Official Answer Key & Detailed Solution

3D PYQ Realm

Ready to check the official UPSC Answer Key?

Click any option above to test yourself under exam conditions, or reveal the explanation directly.

Official UPSC Answer KeyUPSC Prelims 2024 • Science and Technology

Correct Answer: Option (A) — Nitric oxide

Concept & Option Breakdown

Standard Reference Verified

Nitric oxide (NO) is synthesized endogenously by endothelial cells lining blood vessels from L-arginine via the enzyme nitric oxide synthase (NOS). It activates soluble guanylate cyclase, increasing cyclic guanosine monophosphate (cGMP) levels, which induces smooth muscle relaxation, vasodilation, and increased blood flow.

Reviewed by Avinash Sir & Acme AI Research Team

Practice Full-Length & Sectional Prelims Mocks on this Interface

50 simulated tests in the APT Prelims Test Series (₹1,493) or 1-on-1 Mentorship with Avinash Sir.

1-on-1 MentorshipOpen Test Platform

Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2024 (Q2)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Biotechnology & Genetics
Official Answer KeyOption (A) — Nitric oxide

More PYQs from Science and Technology (Biotechnology & Genetics)

Master the Science and Technology syllabus cluster by practicing these related previous year questions.

View All Science and Technology PYQs
2024 • Q1Biotechnology & Genetics

"Membrane Bioreactors" are often discussed in the context of:

Science and TechnologyPractice
2023 • Q3Biotechnology & Genetics

‘Aerial metagenomics’ best refers to which one of the following situations?

Science and TechnologyPractice
2023 • Q4Biotechnology & Genetics

‘Microsatellite DNA’ is used in the case of which one of the following?

Science and TechnologyPractice
2022 • Q5Biotechnology & Genetics

In the context of vaccines manufactured to prevent COVID-19 pandemic, consider the following statements: 1. The Serum Institute of India produced COVI

Science and TechnologyPractice
2022 • Q6Biotechnology & Genetics

‘Biorock technology’ is talked about in which one of the following situations?

Science and TechnologyPractice
2022 • Q7Biotechnology & Genetics

Consider the following statements: DNA Barcoding can be a tool to: 1. Assess the age of a plant or animal. 2. Distinguish among species that look alik

Science and TechnologyPractice
2021 • Q8Biotechnology & Genetics

Bollgard I and Bollgard II technologies are mentioned in the context of:

Science and TechnologyPractice
2019 • Q9Biotechnology & Genetics

With reference to the recent developments in science, which one of the following statements is not correct?

Science and TechnologyPractice

Frequently Asked Questions — UPSC Prelims 2024 Q2

What is the official answer for UPSC Prelims 2024 GS Paper I Question 2 (Science and Technology)?

The official UPSC answer key for this 2024 Science and Technology (Biotechnology & Genetics) question is Option (A): "Nitric oxide". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2024 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Biotechnology & Genetics". You can explore all repeated questions from Biotechnology & Genetics 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 Biotechnology & Genetics UPSC Prelims question using option elimination?

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

Beyond Previous Year Questions

Structured Prelims Practice & Mentorship

Pair previous year question analysis with full-length simulated mock tests and 1-on-1 faculty guidance.

APT 2027 • 50 Prelims Tests17% OFF

Acme Prelims Test Series (APT)

Built to eliminate 1/3rd negative marking losses and 50–50 option traps through structured simulation and NCERT-backed keys.

  • 50 High-Yield Tests: Subject Sectionals, Current Affairs, CSAT Paper II & Full-Length Simulators
  • 1/3rd Penalty & Trap Analytics: Identify whether marks are lost to over-attempting or conceptual gaps
  • Option-by-Option NCERT Keys: Detailed distractor analysis and elimination logic for every question
  • Custom PDF-to-Mock Generator: Convert your revision notes or current affairs PDFs into practice tests
Complete 50-Test Package
₹1,493₹1,799• Valid till Prelims 2027
Explore APT Test SeriesTry Free Mock
1-on-1 Personal MentorshipCapped at 10 Seats

1-on-1 UPSC Mentorship with Avinash Sir

Weekly 1-on-1 strategy reviews, daily study accountability, and personalized MCQ attempt audits with an experienced UPSC mentor.

  • Weekly 1-on-1 Sessions: Direct mentorship with Avinash Sir (Former Plutus IAS Mentor, UPSC & UPPCS Mains Written)
  • APT 50-Test Series Included: Full Prelims GS1 & CSAT test series bundled at no additional cost
  • Mock Attempt & Elimination Audit: Question-by-question review to calibrate your risk and attempt accuracy
  • Prelims & Integrated Tracks: Available as dedicated Prelims mentorship or end-to-end Prelims + Mains guidance
Prelims & Integrated Tracks
17% OFF• Includes APT 50-Test Series
Explore 1-on-1 MentorshipCompare Tracks
Previous QuestionWhich of the following statements about ‘Exercise Mitra Shakti-2023’ are correct ? 1. This was a joint military exercise between India and Bangladesh. 2. It commenced in Aundh (Pune). 3. Joint response during counter-terrorism operations was a goal of this operation. 4. The Indian Air Force was a part of this exercise. Select the answer using the code given below:
Next QuestionConsider the following pairs: | | Country | Reason for Being in the News | |---|---|---| | 1. | Argentina | Worst economic crisis | | 2. | Sudan | War between the country’s regular army and paramilitary forces | | 3. | Turkey | Rescinded its membership of NATO | How many of the pairs given above are correctly matched?