UPSC CSE Prelims 2020
Which of the statements given above are correct?
Statement 1 is correct. Carbon nanotubes (CNTs) are extensively researched for their potential as drug and antigen delivery platforms. Their nanoscale size, high surface area, and ability to be functionalized with biomolecules enable targeted delivery of therapeutic agents within the human body.
Statement 3 is correct. CNTs exhibit excellent electrical conductivity and chemical sensitivity. These properties make them suitable for the development of highly sensitive biochemical sensors capable of detecting various biomolecules, gases, and toxins.
Statement 4 is correct. While typically resistant to degradation, studies have shown that certain functionalized carbon nanotubes can be biodegraded by specific bacteria, fungi, and enzymatic systems. This characteristic is important for their potential environmental safety and biomedical applications.
Statement 2 is incorrect. Despite their robust mechanical properties, using carbon nanotubes as artificial blood capillaries is not currently feasible or safe. CNTs can induce clot formation and trigger adverse immune responses, posing significant challenges for direct vascular applications. Research is ongoing to improve their biocompatibility for such uses.
Option (a) is incorrect because statement 2 is false.
Option (b) is incorrect because statement 2 is false.
Option (d) is incorrect because it includes the false statement 2.