UPSC NCRET SCIENCE AND TECHNOLOGY NOTES: TOPIC WISE SOLVED MCQ’s

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1. A group of scientists at Brookhaven National Laboratory, including few from India, created the antihelium nucleus (heaviest anti-matter). What is/are the implications of it?

1. It will help probe the possibility of the existence of stars and galaxies made of anti-matter.

2. It will help understand the evolution of the universe.

3. It will make mineral prospecting and oil exploration easier and cheaper.

Choose the right answer from the below-given codes:

a) 2 only               b) 1 and 2 only

c) 2 and 3 only     d) 1,2 and 3

Ans: B

2.For the origin of life on the Earth, which of the following elements was primarily responsible?

a) Carbon, Hydrogen, Nitrogen

b) Oxygen, Calcium, Phosphorous

c) Carbon, hydrogen, Potassium

d) Hydrogen, oxygen, Sodium

Ans: A

3. In India, what are the reasons for the people’s resistance to the introduction of BT brinjal?

1. There is some concern that the introduction of Bt brinjal may have an adverse effect on biodiversity.

2. BT brinjal has been created by inserting a gene from a soil fungus into its genome.

3. The seeds of BT brinjal are terminator seeds and therefore, the farmers have to buy to seeds before every season from the seed companies.

4. There is an apprehension that the consumption of Bt brinjal may have an adverse impact on health.

Choose the right answer from the below-given codes:

a) 1 and 3 only     b) 1 and 4 only

c) 2 and 4 only     d) 1,2,3 and 4

Ans: B

4. What are the prospects for which genetically engineered plants have been created, other than resistance to pests?

1. To increase their shelf life

2. To enable them to withstand drought

3. To increase the nutritive value of the produce

4. To enable them to grow and do photosynthesis in spaceships and space stations

Choose the right answer from the below-given codes:

a) 1 and 3 only       b) 2 and 4 only

c) 1,2 and 3 only    d) 1,2,3 and 4

Ans: C

5. There has been a large concern over the short supply of a group of elements called ‘the rare earth metals” Why?

1. Rare earth metals are essential for the manufacture of various electronic items and there is a growing demand for these elements.

2. China, which is the largest producer of these elements, has imposed some restrictions on their export.

3. Other than China, Australia, Canada and Chile, these elements are not found in any country.

Choose the right answer from the below-given codes:

a) 2 only             b) 2 and 3 only

c) 1 and 2 only    d) 1,2 and 3

Ans: C

6. Consider the following organisms:

1. Bird

2. Bat

3. Bee

Which of the above acts as pollinating agents?

a) 1 and 3 only      b) 3 only

c) 1 and 2 only      d) 1,2 and 3

Ans: D

7. If there were no phenomenon of capillarity, _________.

1. One would not be able to use a straw to consume a soft drink

2. The blotting paper would fail to function

3. The big trees that we see around us, would not have grown on the Earth

4. It would be difficult to use a kerosene lamp

Choose the right answer from the below-given codes:

a) 1 and 3 only     b) 2,3 and 4 only

c) 2 and 3 only     d) 1,2,3 and 4

Ans: B

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