Q78 · UPSC Prelims 2017 · Set A · Science and Technology

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What is the application of Somatic Cell Nuclear Transfer Technology?

A Production of biolarvicides
B Manufacture of biodegradable plastics
C Reproductive cloning of animals
D Production of organisms free of diseases

Correct answer: (c) Reproductive cloning of animals

Explanation

  1. A

    Production of biolarvicides

    Biolarvicides are microbial or botanical agents against mosquito larvae (for example Bti). They are not produced by somatic cell nuclear transfer. This option is not the key.

  2. B

    Manufacture of biodegradable plastics

    Biodegradable plastics (PHA, PLA) come from fermentation or petro-substitutes, not from SCNT. This option is therefore wrong.

  3. C

    Reproductive cloning of animals

    Somatic Cell Nuclear Transfer places a somatic nucleus into an enucleated egg so a clone can develop. Dolly the sheep is the textbook animal reproductive-cloning application. That is why (c) is the official key.

  4. D

    Production of organisms free of diseases

    Disease-free organisms may be a breeding goal, but SCNT’s defining application in this question is reproductive cloning, not pathogen-free production as such. This option is not the key.

Summary. Official key is (c) Reproductive cloning of animals. SCNT is the nuclear-transfer method used to clone mammals from a body cell. Biolarvicides and bioplastics are different biotech streams. Creating disease-free stock is not the name of the technique. Dolly (1996) is the landmark SCNT clone.

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