With reference to the recently developed nano-sensor for detecting infections, consider the following statements:
1. It uses an electrochemical biosensor for early diagnosis of sepsis.
2. The sensor selectively detects Lipopolysaccharide (LPS), a component of Gram-positive bacteria.
3. The device can provide results within 10 minutes using a standard addition method.

Which of the statements given above are correct?
(a) 1 and 2 only
(b) 2 only
(c) 1 and 3 only
(d) 1, 2 and 3

Question

With reference to the recently developed nano-sensor for detecting infections, consider the following statements:
1. It uses an electrochemical biosensor for early diagnosis of sepsis.
2. The sensor selectively detects Lipopolysaccharide (LPS), a component of Gram-positive bacteria.
3. The device can provide results within 10 minutes using a standard addition method.

Which of the statements given above are correct?
(a) 1 and 2 only
(b) 2 only
(c) 1 and 3 only
(d) 1, 2 and 3

ONLiNE UPSC · Accepted Answer

The recent development of a nano-sensor designed to detect infections rapidly has garnered significant attention due to its potential to revolutionize early diagnosis, particularly for conditions like sepsis.

Statement 1 is correct: The device developed by NIT Calicut is a portable electrochemical biosensor for detecting endotoxins that indicate sepsis.

Statement 2 is not correct: LPS is a toxic component of the outer membrane of Gram-negative bacteria, not Gram-positive. The sensor uses nanomaterials such as gold atomic clusters, copper oxides (CuO, Cu₂O), carbon nanotubes, reduced graphene oxide, and MoS₂ to improve sensitivity.

Statement 3 is correct: The sensor uses the standard addition method to detect endotoxins in samples like blood serum, and delivers results in under 10 minutes, making it highly efficient for clinical use.

Nanotechnology

Nano-sensors for detecting infections

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M Question 1	⏱ 0
With reference to the recently developed nano-sensor for detecting infections, consider the following statements: 1. It uses an electrochemical biosensor for early diagnosis of sepsis. 2. The sensor selectively detects Lipopolysaccharide (LPS), a component of Gram-positive bacteria. 3. The device can provide results within 10 minutes using a standard addition method. Which of the statements given above are correct? (a) 1 and 2 only (b) 2 only (c) 1 and 3 only (d) 1, 2 and 3