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Science and Technology question from UPSC CSE-Prelims, 2013

Which of the following statements is/are correct?

1. Viruses lack enzymes necessary for the generation of energy.
2. Viruses can be cultured in any synthetic medium.
3. Viruses are transmitted from one organism to another by biological vectors only. 

Select the correct answer using the codes given below. 

Last updated May 15, 2026
Correct Answer: Option A — 1 only
• Correct Answer: (a) 1 only
• Explanation: Viruses lack metabolic machinery and must use a host's energy. They cannot grow on synthetic media (they need living cells), and they can be transmitted through air, water, or touch—not just biological vectors.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.

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UPSC CSE 2013 Prelims

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Exam UPSC CSE
Stage Prelims
Year 2013
Subject Science and Technology
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