Consider the following statements -

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

The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometers long, with lasers shining between the craft." The experiment in question refers to -

1) Voyager-2

2) New Horizons

3) LISA Pathfinder

4) Evolved LISA

Consider the following activities -

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

With reference to carbon nanotubes, consider the following statements -

1. They can be used as 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

In India, why are some nuclear reactors kept under IAEA Safeguards while others are not?

1) Some use uranium and others use thorium

2) Some use imported uranium and others use domestic supplies

3) Some are operated by foreign enterprises and others are operated by domestic enterprises

4) Some are State-owned and others are privately-owned

With reference to solar water pumps, consider the following statements -

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.

What of the statements given above is/ are correct?

1) 1 only

2) 2 only

3) Both 1 and 2

4) Neither 1 nor 2

Which one of the following statements best describes the term Social Cost of Carbon?

It is a measure, in monetary value, of the -

1) long-term damage done by a tonne of CO2 emissions in a given year

2) requirement of fossil fuels for a country to provide goods and services to its citizens, based on the burning of those fuels

3) efforts put in by climate refugee to adapt to live in a new place

4) contribution of an individual person to the carbon footprint on the planet Earth

Which was the first Internet service in India?

1) Advanced Research Projects Agency Network

2) Education and Research Network

3) INDNET

4) HINDNET

The inventor of printing press was -

1) Marshall McLuhan

2) Ts' ai Lun

3) Johann Guttenberg

4) Frederic Barbier

What is the difference between Bluetooth and Wi-Fi devices?

1) Bluetooth uses 2.4 GHz radio frequency band, whereas-Wi-Fi can use 2.4 GHz or 5 GHz frequency band.

2) Bluetooth is used for Wireless Local Area Networks (WLAN) only, whereas Wi-Fi is used for Wireless Wide Area Networks (WWAN) only.

3) When information is transmitted between two devices using Blue-tooth technology, the devices have to be in the line of sight of each other, but when Wi-Fi technology is used the devices need not be in the line of sight of each other

4) The statements (A) and (B) given above are correct in this context

What is the difference between a CFL and an LED lamp? (2011)

1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material.

2. The average life span of a CFL is much longer than that of an LED lamp.

3. A CFL is less energy-efficient as compared to an LED lamp.

Which of the statements given above is/ are correct?

1) 1 only

2) 2 and 3 only

3) 1 and 3 only

4) 1, 2 and 3