With reference to ‘stem cells’, frequently in the news, which of the following statements is/are correct? 1. Stem cells can be derived from mammals only. 2. Stem cells can be used for screening new drugs. 3. Stem cells can be used for medical therapies.
Prelims
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Science and Technology › Genetics,Biotechnology
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Science and Technology › Nanotechnology,Carbon
Science and Technology › Nanotechnology,Carbon
Graphene is frequently in the news recently. What is its importance? 1. It is a two-dimensional material and has good electrical conductivity. 2. It is one of the thinnest but strongest materials tested so far. 3. It is entirely made of silicon and has high optical transparency. 4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs and organic LEDs.
Options
Answer
(C)
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Science and Technology › Nuclear Energy Technology
Science and Technology › Nuclear Energy Technology
To meet its rapidly growing energy demand, some opine that India should pursue research and development on thorium as the future fuel of nuclear energy. In this context, what advantage does thorium hold over uranium?
1. Thorium is far more abundant in nature than uranium.
2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium.
3. Thorium produces less harmful waste compared to uranium.
Which of the statements given above is/are correct?Options
Answer
(D)
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Science and Technology › PhysicsXGeneral
Science and Technology › PhysicsXGeneral
Consider the following statements: If there were no phenomenon of capillarity 1. it would be difficult to use a kerosene lamp 2. one would not be able to use a straw to consume a soft drink 3. the blotting paper would paper would fail to function 4. the big trees that we see around would not have grown on the earth Which of the following statements given above are correct?
Options
Answer
(B)
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Science and Technology › PhysicsXGeneral
Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of the universe? 1. Detection of microwaves in space 2. Observation of redshift phenomenon in space 3. Movement of asteroids in space 4. Occurrence of supernova explosions in space
Options
Answer
(A)
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Science and Technology › PhysicsXGeneral
A team of scientists at Brookhaven National Laboratory including those from India created the heaviest antimatter (anti-helium nucleus). What is/are the implication/ implications of the creation of antimatter? 1. It will make mineral prospecting and oil exploration easier and cheaper. 2. It will help probe the possibility of the existence of stars and galaxies made of antimatter. 3. It will help understand the evolution of the universe.
Options
Answer
(B)
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Science and Technology › PhysicsXGeneral
What is the role of ultraviolet (UV) radiation in the water purification systems? 1. It inactivates/kills the harmful microorganisms in water. 2. It removes all the undesirable odours from the water. 3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.
Options
Answer
(A)
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Science and Technology › SpaceXTheory
Science and Technology › SpaceXTheory
A person stood alone in a desert on a dark night and wanted to reach his village which was situated 5 km east of the point where he was standing. He had no instruments to find the direction, but he located the polestar. The most convenient way now to reach his village is to walk in the:
Options
Answer
(C)