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UPSC 2020: With reference to carbon nanotubes, consider the following statements : 1. They can be used as carriers of drugs and antigens in the human body. 2. They can be made into artificial blood capillaries for an injured part of human body. 3. They can be used in biochemical sensors. 4. Carbon nanotubes are biodegradable. Which of the statements given above are correct ?
(a)1 and 2 only
(b)2, 3 and 4 only
(c)1, 3 and 4 only
(d)1, 2, 3 and 4
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Not attemptedCorrect Answer: (c) 1, 3 and 4 only
CNTs are widely researched as drug/antigen carriers (S 1 correct) and as highly sensitive biochemical/biosensors (S 3 correct). Many studies show certain enzymes (e.g., myeloperoxidase) and microbes can biodegrade functionalised CNTs, so S 4 is accepted as correct. Use of CNTs to fabricate functional, blood-compatible artificial capillaries remains experimental and not yet feasible, so UPSC treated S 2 as incorrect. Therefore statements 1, 3 and 4 only are correct → option (c). ([forumias.com](https://forumias.com/blog/download-answer-key-of-prelims-2020-general-studies-paper-1/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2020 Science & Technology question?▼
The correct answer is option (c): 1, 3 and 4 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Materials & Engineering question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2020, GS Paper 1, as Question 41. It falls under Science & Technology > Materials & Engineering.
What is the difficulty level of this UPSC question?▼
This question is rated "difficult". It is a challenging question that demands deep subject knowledge and analytical thinking.
How many UPSC Prelims questions have been asked from Materials & Engineering?▼
UPSC has asked 23 questions from Materials & Engineering (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.