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Science & Technology GK Questions with Answers – Page 3

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Science & Technology multiple choice questions with answers and explanations, 20 per page, for SSC, Banking, UPSC, Railway and state exams.

502 questions

Science & Technology NotesOnly previous-year questions (128)GK Quiz
Q41.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2018, GS Paper IHard

With reference to the Genetically Modified mustard (GM mustard) developed in India, consider the following statements : 1. GM mustard has the genes of a soil bacterium that give the plant the property of pest-resistance to a wide variety of pests. 2. GM mustard has the genes that allow the plant cross-pollination and hybridization. 3. GM mustard has been developed jointly by the IARI and Punjab Agricultural University. Which of the statements given above is/are correct ?

  1. A.1 and 3 only
  2. B.2 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: B. 2 only

India's GM mustard, Dhara Mustard Hybrid-11 (DMH-11), is built for hybrid seed production, not pest resistance. It carries the barnase and barstar genes taken from the soil bacterium Bacillus amyloliquefaciens.

Q42.Science & TechnologyAsked in: UPSC CAPF · CAPF 2023, Paper IEasy

What are Airawat, Param Siddhi, Pratyush and Mihir?

  1. A.Super Computers of India
  2. B.Battle Tanks of India
  3. C.Supersonic Missiles of India
  4. D.Indian Naval Ships
Show answer
Correct answer: A. Super Computers of India

All four are high-performance computing systems built or installed in India for research, weather forecasting and artificial intelligence. PARAM Siddhi-AI was built by C-DAC under the National Supercomputing Mission and is installed at C-DAC, Pune.

Q43.Science & TechnologyAsked in: UPSC CAPF · CAPF 2019, Paper IEasy

Which one of the following is the name given by Indian Railways to the indigenously manufactured Train 18?

  1. A.Humsafar Express
  2. B.Vande Bharat Express
  3. C.Ananya Express
  4. D.Gatimaan Express
Show answer
Correct answer: B. Vande Bharat Express

Train 18, India's first indigenous semi-high-speed train set, was named Vande Bharat Express in January 2019. Train 18 was designed and built by the Integral Coach Factory in Chennai and got its name because it was planned for 2018.

Q45.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium

With reference to 'Bitcoins', sometimes seen in the news, which of the following statements is/are correct? 1. Bitcoins are tracked by the Central Banks of the countries. 2. Anyone with a Bitcoin address can send and receive Bitcoins from anyone else with a Bitcoin address. 3. Online payments can be sent without either side knowing the identity of the other. Select the correct answer using the code given below.

  1. A.1 and 2 only
  2. B.2 and 3 only
  3. C.3 only
  4. D.1, 2 and 3
Show answer
Correct answer: B. 2 and 3 only

Bitcoin is a decentralised peer-to-peer currency that no central bank issues or tracks, and payments are made between addresses rather than named people.

Q46.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2021, GS Paper IEasy

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

  1. A.clonal propagation of crop plants
  2. B.developing genetically modified crop plants
  3. C.production of plant growth substances
  4. D.production of biofertilizers
Show answer
Correct answer: B. developing genetically modified crop plants

Bollgard I and Bollgard II are Bt cotton technologies that make the cotton plant resistant to bollworms. Bt cotton carries genes taken from the soil bacterium Bacillus thuringiensis, which make Cry proteins that are toxic to the larvae of bollworms.

Q47.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2023, GS Paper IMedium

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

  1. A.Studying the evolutionary relationships among various species of fauna
  2. B.Stimulating 'stem cells' to transform into diverse functional tissues
  3. C.Promoting clonal propagation of horticultural plants
  4. D.Assessing the efficacy of drugs by conducting series of drug trials in a population
Show answer
Correct answer: A. Studying the evolutionary relationships among various species of fauna

Microsatellites are genetic markers that show how closely related individuals, populations and species are. Microsatellites, also called short tandem repeats (STRs) or simple sequence repeats, are stretches of DNA in which a short motif of one to six bases, such as CA, is repeated many times.

Q48.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2023, GS Paper IMedium

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

  1. A.Collecting DNA samples from air in a habitat at one go
  2. B.Understanding the genetic makeup of avian species of a habitat
  3. C.Using air-borne devices to collect blood samples from moving animals
  4. D.Sending drones to inaccessible areas to collect plant and animal samples from land surfaces and water bodies
Show answer
Correct answer: A. Collecting DNA samples from air in a habitat at one go

Aerial metagenomics reads all the DNA floating in the air of a place together. Every living thing sheds traces of DNA through skin cells, hair, pollen, spores and droppings, and this environmental DNA, or eDNA, drifts in the air.

Q49.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2025, GS Paper IMedium

With reference to India's defence, consider the following pairs : Aircraft type — Description I. Dornier-228 : Maritime patrol aircraft II. IL-76 : Supersonic combat aircraft III. C-17 Globemaster III : Military transport aircraft How many of the pairs given above are correctly matched?

  1. A.Only one
  2. B.Only two
  3. C.All the three
  4. D.None
Show answer
Correct answer: B. Only two

Pairs I and III are correct; the IL-76 is a heavy transport aircraft, not a supersonic fighter.

Q50.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2020, GS Paper IHard

According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels ? 1. Cassava 2. Damaged wheat grains 3. Groundnut seeds 4. Horse gram 5. Rotten potatoes 6. Sugar beet Select the correct answer using the code given below:

  1. A.1, 2, 5 and 6 only
  2. B.1, 3, 4 and 6 only
  3. C.2, 3, 4 and 5 only
  4. D.1, 2, 3, 4, 5 and 6
Show answer
Correct answer: A. 1, 2, 5 and 6 only

The policy allows cassava, damaged wheat, rotten potatoes and sugar beet, but not groundnut seeds or horse gram. The National Policy on Biofuels, 2018 widened the raw materials for ethanol beyond sugarcane molasses.

Q51.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2018, GS Paper IEasy

In which of the following areas can GPS technology be used ? 1. Mobile phone operations 2. Banking operations 3. Controlling the power grids Select the correct answer using the code given below:

  1. A.1 only
  2. B.2 and 3 only
  3. C.1 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3

Besides location, GPS satellites broadcast extremely precise time, and mobile networks, banks and power grids all depend on that timing.

Q52.Science & TechnologyAsked in: UPSC CAPF · CAPF 2024, Paper IEasy

"Mission Shakti" (DRDO) is the name given by India to

  1. A.Inter-Continental Ballistic Missile
  2. B.Air-to-Air Missile
  3. C.Anti-Satellite Missile
  4. D.Nuclear-Powered Attack Submarine
Show answer
Correct answer: C. Anti-Satellite Missile

Mission Shakti was India's anti-satellite (ASAT) missile test, carried out by DRDO on 27 March 2019. In the test, a Ballistic Missile Defence interceptor launched from Dr A.P.J.

Q53.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2023, GS Paper IMedium

With reference to green hydrogen, consider the following statements :

1. It can be used directly as a fuel for internal combustion.

2. It can be blended with natural gas and used as fuel for heat or power generation.

3. It can be used in the hydrogen fuel cell to run vehicles.

How many of the above statements are correct?

  1. A.Only one
  2. B.Only two
  3. C.All three
  4. D.None
Show answer
Correct answer: C. All three

Green hydrogen is chemically the same as any hydrogen, so it can be burnt in engines, mixed with natural gas or used in fuel cells.

Q54.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2023, GS Paper IMedium

Consider the following statements :

1. Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket-powered only in the initial phase of flight.

2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.

Which of the statements given above is/are correct?

  1. A.1 only
  2. B.2 only
  3. C.Both 1 and 2
  4. D.Neither 1 nor 2
Show answer
Correct answer: D. Neither 1 nor 2

Both statements swap the features of ballistic and cruise missiles. A ballistic missile is rocket-powered only in the first, boost phase; after that it follows a high, curved, mostly unpowered path, re-entering the atmosphere at very high speed.

Q56.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2017, GS Paper IMedium

With reference to agriculture in India, how can the technique of 'genome sequencing', often seen in the news, be used in the immediate future ?

1. Genome sequencing can be used to identify genetic markers for disease resistance and drought tolerance in various crop plants.

2. This technique helps in reducing the time required to develop new varieties of crop plants.

3. It can be used to decipher the host-pathogen relationships in crops.

Select the correct answer using the code given below :

  1. A.1 only
  2. B.2 and 3 only
  3. C.1 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3

Genome sequencing helps find useful genes, speeds up breeding and shows how pathogens attack crops. Genome sequencing reads the complete order of bases in an organism's DNA.

Q57.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper IHard

In the context of proposals to the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements :

1. The main advantage of the use of H-CNG is the elimination of carbon monoxide emissions.

2. H-CNG as fuel reduces carbon dioxide and hydrocarbon emissions.

3. Hydrogen up to one-fifth by volume can be blended with CNG as fuel for buses.

4. H-CNG makes the fuel less expensive than CNG.

Which of the statements given above is/are correct?

  1. A.1 only
  2. B.2 and 3 only
  3. C.4 only
  4. D.1, 2, 3 and 4
Show answer
Correct answer: B. 2 and 3 only

H-CNG lowers carbon dioxide and hydrocarbon emissions, and hydrogen up to about a fifth by volume can be mixed into CNG for buses.

Q58.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2025, GS Paper IMedium

Consider the following statements :

Statement I : Of the two major ethanol producers in the world, i.e., Brazil and the United States of America, the former produces more ethanol than the latter.

Statement II : Unlike in the United States of America where corn is the principal feedstock for ethanol production, sugarcane is the principal feedstock for ethanol production in Brazil.

Which one of the following is correct in respect of the above statements?

  1. A.Both Statement I and Statement II are correct and Statement II explains Statement I
  2. B.Both Statement I and Statement II are correct but Statement II does not explain Statement I
  3. C.Statement I is correct but Statement II is not correct
  4. D.Statement I is not correct but Statement II is correct
Show answer
Correct answer: D. Statement I is not correct but Statement II is correct

The United States, not Brazil, is the world's largest ethanol producer, while the feedstocks named in Statement II are right.

Q59.Science & TechnologyAsked in: CDS · CDS-II 2024, GKEasy

Mission Shakti (DRDO) of India is related to which one among the following ?

  1. A.Launch of multiple satellites using a single rocket
  2. B.Launch of heavy satellites
  3. C.Use of high power rockets in launching of satellites
  4. D.Use of rocket to destroy an orbiting satellite
Show answer
Correct answer: D. Use of rocket to destroy an orbiting satellite

Mission Shakti was India's first anti-satellite (ASAT) missile test. On 27 March 2019 DRDO fired a ground-launched interceptor from Dr. A.P.J.

Q60.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium

Which one of the following is the best description of 'INS Astradharini', that was in the news recently?

  1. A.Amphibious warfare ship
  2. B.Nuclear-powered submarine
  3. C.Torpedo launch and recovery vessel
  4. D.Nuclear-powered aircraft carrier
Show answer
Correct answer: C. Torpedo launch and recovery vessel

INS Astradharini is an Indian Navy ship built to launch torpedoes during trials and recover them afterwards. The vessel was commissioned at Visakhapatnam in 2015.