Science And Technology Questions In UPSC Prelims 2019

1. Chlorophyll content in the vegetation of a specific location
2. Greenhouse gas emissions from rice paddies of a specific location
3. Land surface temperatures of a specific location

Select the correct answer using the code given below.

1. 1 Only
2. 2 and 3 only
3. 3 only
4. 1, 2 and 3

1. LTE is commonly marketed as 3G and VoLTE is commonly marketed as advanced 3G.
2. LTE is data-only technology and VoLTE is voice-only technology.

Select the correct answer using the code given below

1. 1 Only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2

Answer: D

1. Japan
2. Russia
3. The United Kingdom
4. The United States of America

Answer: B

1. In Augmented Reality (AR), a simulated environment is created and the physical world is completely shut out.
2. In Virtual Reality (VR), images generated from a computer are projected onto real-life objects or surroundings.
3. AR allows individuals to be present in the world and improves the experience using the camera of smart-phone or PC.
4. VR closes the world, and transposes an individual, providing complete immersion experience.

Which of the statements given above is/are correct?

1. 1 and 2 only
2. 3 and 4
3. 1, 2 and 3
4. 4 only

Answer: B

1. Functional chromosomes can be created by joining segments of DNA taken from cells of different species.
2. Pieces of artificial functional DNA can be created in laboratories.
3. A piece of DNA taken out from an animal cell can be made to replicate outside a living cell in a laboratory.
4. Cells taken out from plasma and animals can be made to undergo cell division in laboratory petri dishes.

Answer: A

A digital signature is

1. An electronic record that identifies the certifying authority issuing it
2. Used to serve as a proof of identity of an individual to access information or server on Internet
3. An electronic method of signing an electronic document and ensuring that the original content is unchanged

Which of the statements given above is/are correct?

1. 1 only
2. 2 and 3 only
3. 3 only
4. 1, 2 and 3

Answer: C

1. Location identification of a person
2. Sleep monitoring of a person
3. Assisting the hearing-impaired person

Select the correct answer using the code given below:

1. 1 only
2. 2 and 3 only
3. 3 only
4. 1, 2 and 3

Answer: D

1. It is used in developing gene silencing therapies.
2. It can be used in developing therapies for the treatment of cancer.
3. It can be used to develop hormone replacement therapies.
4. It can be used to produce crop plants that are resistant to viral pathogens.

Select the correct answer using the code given below.

1. 1, 2 and 4
2. 2 and 3
3. 1 and 3
4. 1 and 4 only

Answer: A

1. ‘Higgs boson particles’ were detected.
2. ‘Gravitational waves’ were detected.
3. Possibility of inter-galactic space travel through ‘wormhole’ was confirmed.
4. It enabled the scientists to understand ‘singularity’.

Answer: B

1. Genetic predisposition of some people
2. Taking incorrect doses of antibiotics to cure diseases
3. Using antibiotics in livestock farming
4. Multiple chronic diseases in some people

Select the correct answer using the code given below.

1. 1 and 2
2. 2 and 3 only
3. 1, 3 and 4
4. 2, 3 and 4

Answer: D

1. A molecular scissors used in targeted gene editing
2. A biosensor used in the accurate detection of pathogens in patients
3. A gene that makes plants pest-resistant
4. A herbicidal substance synthesized in genetically modified crops

Answer: A

1. Hepatitis B virus is transmitted much like HIV.
2. Hepatitis B. unlike Hepatitis C, does not have a vaccine.
3. Globally, the number of people infected with Hepatitis B and C viruses arc several times more than those infected with HIV.
4. Some of those infected with Hepatitis B and C viruses do not show the symptoms for many years.

Answer: B