UPSC Prelims Previous Year Questions

Science & TechnologyHealth, Diseases and Medical TechnologyImmunity, Vaccines and ImmunisationMedium

Question details

Type:: Statement based
Skill:: Fact recall
Tags:: recombinant-vector vaccines · Immunity, Vaccines and Immunisation
Related topics:: Recombinant DNA, GM Organisms and Transgenics

Classification and difficulty are editorial labels. Explanations are awaiting review.

2021 · Q65

With reference to recent developments regarding ‘Recombinant Vector Vaccines’, consider the following statements: 1. Genetic engineering is applied in the development of these vaccines. 2. Bacteria and viruses are used as vectors. Which of the statements given above is/are correct?

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Science & TechnologyGenetics and BiotechnologyGene Editing, Gene Therapy and Genetic EngineeringMedium

Question details

Type:: Statement based
Skill:: Fact recall
Tags:: mitochondrial replacement · Gene Editing, Gene Therapy and Genetic Engineering
Related topics:: Genetics, Heredity and Gene Expression

Classification and difficulty are editorial labels. Explanations are awaiting review.

2021 · Q66

In the context of hereditary diseases, consider the following statements: 1. Passing on mitochondrial diseases from parent to child can be prevented by mitochondrial replacement therapy either before or after in vitro fertilization of egg. 2. A child inherits mitochondrial diseases entirely from mother and not from father. Which of the statements given above is/are correct?

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Science & TechnologyPhysics and Applied PhysicsHeat, Thermodynamics and CryogenicsMedium

Question details

Type:: Statement based
Skill:: Fact recall
Tags:: pressure cooker · Heat, Thermodynamics and Cryogenics

Classification and difficulty are editorial labels. Explanations are awaiting review.

2021 · Q68

In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following? 1. Area of the hole in the lid 2. Temperature of the flame 3. Weight of the lid Select the correct answer using the code given below.

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Science & TechnologyBiology and Human PhysiologyMicrobiology and VirologyEasy

Question details

Type:: Statement based
Skill:: Fact recall
Tags:: microbial cultures · Microbiology and Virology

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2021 · Q69

Consider the following: 1. Bacteria 2. Fungi 3. Virus Which of the above can be cultured in artificial/synthetic medium?

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Science & TechnologyBiology and Human PhysiologyMicrobiology and VirologyMedium

Question details

Type:: Statement based
Skill:: Fact recall
Tags:: adenoviruses and retroviruses · Microbiology and Virology
Related topics:: Viral Diseases and Antiviral Response

Classification and difficulty are editorial labels. Explanations are awaiting review.

2021 · Q70

Consider the following statements: 1. Adenoviruses have single-stranded DNA genomes whereas retroviruses have double-stranded DNA genomes. 2. Common cold is sometime caused by an adenovirus whereas AIDS is caused by a retrovirus. Which of the statements given above is/are correct?

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Science & TechnologyChemistry and Materials ScienceAtomic Structure, Bonding and Molecular PropertiesEasy

Question details

Type:: Single choice
Skill:: Fact recall
Tags:: water as solvent · Atomic Structure, Bonding and Molecular Properties

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2021 · Q71

Water can dissolve more substances than any other liquid because

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Science & TechnologyPhysics and Applied PhysicsOptics, Lasers and PhotonicsMedium

Question details

Type:: Statement based
Skill:: Fact recall
Tags:: sodium lamps and LEDs · Optics, Lasers and Photonics

Classification and difficulty are editorial labels. Explanations are awaiting review.

2021 · Q72

With reference to street-lighting, how do sodium lamps differ from LED lamps? 1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps. 2. As street-lights, sodium lamps have longer life span than LED lamps. 3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street-lighting. Select the correct answer using the code given below.

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Science & TechnologyHealth, Diseases and Medical TechnologyViral Diseases and Antiviral ResponseEasy

Question details

Type:: Single choice
Skill:: Fact recall
Tags:: ACE2 and viral entry · Viral Diseases and Antiviral Response
Related topics:: Cell Biology and Biomolecules

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2021 · Q73

The term ‘ACE2’ is talked about in the context of

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Science & TechnologyChemistry and Materials SciencePolymers, Plastics and ElastomersEasy

Question details

Type:: Single choice
Skill:: Fact recall
Tags:: bisphenol A · Polymers, Plastics and Elastomers
Related topics:: Toxic Chemicals, Pesticides and Persistent Organic Pollutants

Classification and difficulty are editorial labels. Explanations are awaiting review.

2021 · Q74

Bisphenol A (BPA), a cause of concern, is a structural/key component in the manufacture of which of the following kinds of plastics?

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Science & TechnologySpace Science and Space ProgrammesAstronomy, Cosmology and AstrophysicsEasy

Question details

Type:: Single choice
Skill:: Fact recall
Tags:: light-year measurement · Astronomy, Cosmology and Astrophysics

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2021 · Q76

Which one of the following is a reason why astronomical distances are measured in light-years?

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Themes in Science & Technology· 11

PYQs on Science & Technology

Prelims 2021

Science & Technology

Themes in Science & Technology· 11

PYQs on Science & Technology

Prelims 2021

Prelims 2021, question 65: Immunity, Vaccines and Immunisation

Prelims 2021, question 66: Gene Editing, Gene Therapy and Genetic Engineering

Prelims 2021, question 68: Heat, Thermodynamics and Cryogenics

Prelims 2021, question 69: Microbiology and Virology

Prelims 2021, question 70: Microbiology and Virology

Prelims 2021, question 71: Atomic Structure, Bonding and Molecular Properties

Prelims 2021, question 72: Optics, Lasers and Photonics

Prelims 2021, question 73: Viral Diseases and Antiviral Response

Prelims 2021, question 74: Polymers, Plastics and Elastomers

Prelims 2021, question 76: Astronomy, Cosmology and Astrophysics