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UPSC PYQPrelims 2020

Civil Services Examination · Question 41

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?

  1. 1 and 2 only
  2. 2, 3 and 4 only
  3. 1, 3 and 4 only
  4. 1, 2, 3 and 4
Show answer & explanation

Answer: (D) 1, 2, 3 and 4

Explanation

CNTs are used for drug/antigen delivery, have been researched as artificial capillaries, are used in biosensors, and studies show they can be biodegraded by enzymes such as myeloperoxidase. The official UPSC key gives (d).