Science And Technology Questions In UPSC Prelims 2020

1. Plant cells have cellulose cell walls whilst animal cells do not.
2. Plant cells do not have plasma membrane unlike animal cells which do.
3. Mature plant cell has one large vacuole whilst an animal cell has many small vacuoles.

Select the correct answer using the code given below :

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

1. Fertilization of egg in vitro by the donor sperm
2. Genetic modification of sperm producing cells
3. Development of stem cells into functional embryos
4. Prevention of mitochondrial diseases in offspring

1. These vaccines are effective against pneumonia as well as meningitis and sepsis.
2. Dependence on antibiotics that are not effective against drug-resistant bacteria can be reduced.
3. These vaccines have no side effects and cause no allergic reactions.

Select the correct answer using the code given below :

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

1. They can be used as the carriers of drugs and antigens in the human body.
2. They can be made into artificial blood capillaries for an injured part of human body.
3. They can be used in biochemical sensors.
4. Carbon nanotubes are biodegradable.

Which of the statements given above are correct ?

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

1. Genetic changes can be introduced in the cells that produce eggs or sperms of a prospective parent.
2. A person’s genome can be edited before birth at the early embryonic stage.
3. Human induced pluripotent stem cells can be injected into the embryo of a pig.

Which of the statements given above is/are correct ?

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

1. Bring down electricity consumption in industrial units
2. Create meaningful short stories and songs
3. Disease diagnosis
4. Text-to-speech conversion
5. Wireless transmission of electrical energy

Select the correct answer using the code given below:

1. 1, 2, 3 and 5 only
2. 1, 3, and 4 only
3. 2, 4, and 5 only
4. 1, 2, 3, 4 and 5

1. VLC uses electromagnetic spectrum wavelengths 375 to 780nm
2. VLC is known as long-range optical wireless communication
3. VLC can transmit large amounts of data faster than Bluetooth
4. VLC has no electromagnetic interference

Select the correct answer using the code given below

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

1. Digital security infrastructure
2. Food security infrastructure
3. Health care and education infrastructure
4. Telecommunication and transportation infrastructure

1. Spraying pesticides on a crop field
2. Inspecting the craters of active volcanoes
3. Collecting breath samples from spouting whales for DNA analysis

At the present level of technology, which of the above activities can be successfully carried out by using drones ?

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

1. Voyager-2
2. New Horizons
3. LISA Pathfinder
4. Evolved LISA

1. Solar power can be used for running surface pumps and not for submersible pumps,
2. Solar power can be used for running centrifugal pumps and not the ones with piston.

Which of the statements given above is/are correct?

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