UPSC Prelims 2021 Science & Technology

Water can dissolve more substances than any other liquid because

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

With reference to recent developments regarding ‘Recombinant Vector Vaccines’, consider the following statements: 1. Genetic engineering is applied in the de...

Which one of the following is used in preparing a natural mosquito repellent?

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 LE...

In the context of hereditary diseases, consider the following statements: 1. Passing on mitochondrial diseases from parent to child can be prevented by mitoc...

Which of the following have species that can establish symbiotic relationship with other organisms? 1. Cnidarians 2. Fungi 3. Protozoa Select the correct ans...

In the nature, which of the following is/are most likely to be found surviving on a surface without soil? 1. Fern 2. Litchen 3. Moss 4. Mushroom Select the c...

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

Consider the following statements: 1. Adenoviruses have single-stranded DNA genomes whereas retroviruses have double-stranded DNA genomes. 2. Common cold is ...

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

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 ...