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7 September 2026

Stability of peptides in sulphuric acid

This scientific discovery provides interesting context for space exploration and astrobiology, but it is a niche research finding that is unlikely to be the subject of a direct UPSC question.

1 min read 1 questions 2 prelims

Notes

  • Researchers discovered that certain peptides remain stable in 98% concentrated sulphuric acid.
  • Peptides are short chains of amino acids that constitute proteins.
  • The study, published in the Proceedings of the National Academy of Sciences, challenges the assumption that concentrated sulphuric acid is universally destructive to biological building blocks.
  • Stability is attributed to the lack of water in 98% sulphuric acid, which prevents the hydrolysis process that normally breaks peptide bonds.
  • Using nuclear magnetic resonance spectroscopy, researchers observed peptides folding into an 'omega loop' structure.
  • Sulphuric acid molecules act as scaffolding to maintain the 3D shape of these peptides.
  • This structural behavior differs from protein folding in water, which typically results in helices or sheets.
  • The findings have implications for astrobiology, specifically regarding the potential for complex chemistry in environments like the sulphuric acid clouds of Venus.

Questions

  1. Recent scientific findings regarding the stability of peptides in concentrated sulphuric acid challenge conventional understandings of biological chemistry. Discuss the implications of these findings for the search for extraterrestrial life. 150 words
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Prelims

  1. Which of the following best explains why certain peptides remain stable in 98% concentrated sulphuric acid?

  2. In the context of recent research, what is the significance of the 'omega loop' structure in peptides?

Syllabus

Topics

Sources

250words.in · https://250words.in/daily/2026-09-07/stability-of-peptides-in-sulphuric-acid