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Science & Tech

With reference to Visible Light Communication (VLC) technology, which of the following statements are correct?

1. VLC uses electromagnetic spectrum wavelengths 375 to 780 nm 2. VLC is known as long-range optical wireless communication. 3....

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With the present state of development, Artificial Intelligence can effectively do which of the following?

1. Bring down electricity consumption in industrial units  2. Create meaningful short stories and songs 3. Disease diagnosis 4. Text-to-Speech...

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In the context of recent advances in human reproductive technology, “Pronuclear Transfer” is used for:

(a) Fertilisation of egg in vitro by the donor sperm (b) Genetic modification of sperm-producing cells (c) Development of stem...

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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...

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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  Ans: d  Explanation: Triclosan is an antimicrobial active...

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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  Ans: b  Explanation: PC (polycarbonate) has good transparency and...

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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...

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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....

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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...

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Consider the following statements: 

Consider the following statements:  1. Adenoviruses have single-stranded DNA  genomes whereas retroviruses have double stranded DNA genomes.  2. Common cold...

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