1) Water can dissolve more substances than any other liquid because
(a) it is dipolar in nature
(b) it is a good conductor of heat
(c) it has high value of specific heat
(d) it is an oxide of hydrogen
Correct Answer: (A) it is dipolar in nature
2) With reference to street lighting, how do sodium lamps differ from LED lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street-lights, sodium lamps have longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting.
Select the correct answer using the code given below:
(a) 3 only
(b) 2 only
(c) 1 and 3
(d) 1, 2 and 3
Correct Answer: (C) 1 and 3
3) The term ‘ACE2’ is talked about in the context of
(a) genes introduced in the genetically modified plants
(b) development of India’s own satellite navigation system
(c) radio collar for wildlife tracking
(d) spread of viral diseases
Correct Answer: (D) spread of viral diseases
4) Bisphenol A (BPA), a cause of concern, is a structural/key component in the manufacture of which of the following kinds of plastics?
(a) Low density polyethylene
(b) Polycarbonate
(c) Polyethylene terephthalate
(d) Polyvinyl chloride
Correct Answer: (B) Polycarbonate
5) Triclosan considered harmful when exposed to high levels for a long time, is most likely present in which of the following?
(a) Food preservatives
(b) Fruit-ripening substances
(c) Reused plastic containers
(d) Toiletries
Correct Answer: (D) Toiletries
6) Which one of the following is a reason why astronomical distances are measured in light-years?
(a) Distances among stellar bodies do not change.
(b) Gravity of stellar bodies does not change.
(c) Light always travels in a straight line.
(d) Speed of light is always same.
Correct Answer: (D) Speed of light is always same.
7) With reference to recent developments regarding ‘Recombinant Vector Vaccines’, consider the following statements:
1. Genetic engineering is applied in the development of these vaccines.
2. Bacteria and viruses are used as vectors.
Which of the statements given above is/are correct?
(a) 1 Only
(b) 2 Only
(c) Both 1 and 2
(d) Neither 1 nor 2
Correct Answer: (B) 2 Only
8) In the context of hereditary diseases, consider the following statements:
1. Passing on mitochondrial diseases from parent to child can be prevented by mitochondrial replacement therapy either before or after in vitro fertilization of egg.
2. A child inherits mitochondrial diseases entirely from mother and not from father.
Which of the statements given above is/are correct?
(a) 1 Only
(b) 2 Only
(c) Both 1 and 2
(d) Neither 1 nor 2
Correct Answer: (C) Both 1 and 2
9) Bollgard I and Bollgard II technologies are mentioned in the context of
(a) clonal propagation of crop plants.
(b) developing genetically modified crop plants.
(c) production of plant growth substances.
(d) production of biofertilizers.
Correct Answer: (B) developing genetically modified crop plants.
10) In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?
1. Area of the hole in the lid.
2. Temperature of the flame
3. Weight of the lid
Select the correct answer using the code given below.
(a) 1 and 2 Only
(b) 2 and 3 Only
(c) 1 and 3 Only
(d) 1, 2 and 3
Correct Answer: (D) 1, 2 and 3
11) Consider the following:
1. Bacteria
2. Fungi
3. Virus
Which of the above can be cultured in artificial/synthetic medium?
(a) 1 and 2 Only
(b) 2 and 3 Only
(c) 1 and 3 Only
(d) 1, 2 and 3
Correct Answer: (A) 1 and 2 Only
12) Consider the following:
1. Adenoviruses have single-stranded DNA genomes whereas retroviruses have double-stranded DNA genomes.
2. Common cold is sometime caused by an adenovirus whereas AIDS is caused by a retrovirus.
Which of the statements given above is/are correct?
(a) 1 Only
(b) 2 Only
(c) Both 1 and 2
(d) Neither 1 nor 2
Correct Answer: (B) 2 Only
