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4392 Previous Year Questions • 2016–2026 • Prelims, Mains, Essay, Optionals
Prelims - Paper 1 (GS)
20 shown2021•Prelims•Paper 1 (GS)•Q.61
The vegetation of savannah consists of grassland with scattered small trees, but extensive areas have no trees. The forest development in such areas is generally kept in check by one or more or a combination of some conditions. Which of the following are such conditions?
1
Burrowing animals and termites
2
Fire
3
Grazing herbivores
4
Seasonal rainfall
5
Soil properties
Environmental Ecology - Savanna ecosystem factors limiting tree growth
2021•Prelims•Paper 1 (GS)•Q.62
With reference to the water on the planet Earth, consider the following statements :
1
The amount of water in the rivers and lakes is more than the amount of groundwater.
2
The amount of water in polar ice caps and glaciers is more than the amount of groundwater.
Hydrosphere - Global water distribution (rivers, lakes, groundwater, ice caps)
2021•Prelims•Paper 1 (GS)•Q.63
Consider the following statements :
1
Moringa (drumstick tree) is a leguminous evergreen tree.
2
Tamarind tree is endemic to South Asia.
3
In India, most of the tamarind is collected as minor forest produce.
4
India exports tamarind and seeds of moringa.
5
Seeds of moringa and tamarind can be used in the production of biofuels.
Biodiversity and Economic Botany - Characteristics and uses of Moringa and Tamarind
2021•Prelims•Paper 1 (GS)•Q.64
The black cotton soil of India has been formed due to the weathering of
Indian Geography - Formation of black cotton (regur) soil
2021•Prelims•Paper 1 (GS)•Q.65
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.
General Science - Recombinant vector vaccines and biotechnology
2021•Prelims•Paper 1 (GS)•Q.66
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.
General Science (Mitochondrial genetics)
2021•Prelims•Paper 1 (GS)•Q.67
Bollgard I and Bollgard II technologies are mentioned in the context of
Agricultural Biotechnology (Bt cotton)
2021•Prelims•Paper 1 (GS)•Q.68
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
Physics (Pressure cooker)
2021•Prelims•Paper 1 (GS)•Q.69
Consider the following :
1
Bacteria
2
Fungi
3
Virus
Microbiology (Culture of microorganisms)
2021•Prelims•Paper 1 (GS)•Q.70
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.
Virology (Virus genome types)
2021•Prelims•Paper 1 (GS)•Q.71
Water can dissolve more substances than any other liquid because
General Science
2021•Prelims•Paper 1 (GS)•Q.72
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.
General Science
2021•Prelims•Paper 1 (GS)•Q.73
The term 'ACE2' is talked about in the context of
General Science
2021•Prelims•Paper 1 (GS)•Q.74
Bisphenol A (BPA), a cause of concern, is a structural/key component in the manufacture of which of the following kinds of plastics?
Environmental ecology
2021•Prelims•Paper 1 (GS)•Q.75
'Triclosan', considered harmful when exposed to high levels for a long time, is most likely present in which of the following?
Environmental ecology
2021•Prelims•Paper 1 (GS)•Q.76
Which one of the following is a reason why astronomical distances are measured in light-years?
General Science
2021•Prelims•Paper 1 (GS)•Q.77
We adopted parliamentary democracy based on the British model, but how does our model differ from that model?
1
As regards legislation, the British Parliament is supreme or sovereign but in India, the power of the Parliament to legislate is limited.
2
In India, matters related to the constitutionality of the Amendment of an Act of the Parliament are referred to the Constitution Bench by the Supreme Court.
Polity
2021•Prelims•Paper 1 (GS)•Q.78
With reference to the Union Government, consider the following statements :
1
N. Gopalaswamy Iyengar Committee suggested that a minister and a secretary be designated solely for pursuing the subject of administrative reform and promoting it.
2
In 1970, the Department of Personnel was constituted on the recommendation of the Administrative Reforms Commission, 1966, and this was placed under the Prime Minister's charge.
Polity
2021•Prelims•Paper 1 (GS)•Q.79
'Right to Privacy' is protected under which Article of the Constitution of India?
Polity
2021•Prelims•Paper 1 (GS)•Q.80
Consider the following statements :
1
In India, there is no law restricting the candidates from contesting in one Lok Sabha election from three constituencies.
2
In 1991 Lok Sabha Election, Shri Devi Lal contested from three Lok Sabha constituencies.
3
As per the existing rules, if a candidate contests in one Lok Sabha election from many constituencies, his/her party should bear the cost of bye-elections to the constituencies vacated by him/her in the event of him/her winning in all the constituencies.
Polity