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3 questions · 2019 · answers as per the UPSC key

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UPSC 2019 · Q93 · Science & Technology › Biotechnology & Genetics · Save

With reference to the recent developments in science, which one of the following statements is not correct?

(a) Functional chromosomes can be created by joining segments of DNA taken from cells of different species.
(b) Pieces of artificial functional DNA can be created in laboratories.
(c) A piece of DNA taken out from an animal cell can be made to replicate outside a living cell in a laboratory.
(d) Cells taken out from plants and animals can be made to undergo cell division in laboratory petri dishes.
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Answer: (a) Functional chromosomes can be created by joining segments of DNA taken from cells of different species.
UPSC 2019 · Q96 · Science & Technology › Biotechnology & Genetics · Save

‘RNA interference (RNAi)’ technology has gained popularity in the last few years. Why?

  1. It is used in developing gene silencing therapies.
  2. It can be used in developing therapies for the treatment of cancer.
  3. It can be used to develop hormone replacement therapies.
  4. It can be used to produce crop plants that are resistant to viral pathogens.

Select the correct answer using the code given below.

(a) 1, 2 and 4
(b) 2 and 3
(c) 1 and 3
(d) 1 and 4 only
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Answer: (a) 1, 2 and 4
UPSC 2019 · Q99 · Science & Technology › Biotechnology & Genetics · Save

What is Cas9 protein that is often mentioned in news?

(a) A molecular scissors used in targeted gene editing
(b) A biosensor used in the accurate detection of pathogens in patients
(c) A gene that makes plants pest-resistant
(d) A herbicidal substance synthesized in genetically modified crops
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Answer: (a) A molecular scissors used in targeted gene editing