The Japan Aerospace Exploration Agency (JAXA) announced that samples from the asteroid Ryugu contain all five canonical 'letters' of DNA and RNA
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Why in news
The Japan Aerospace Exploration Agency (JAXA) announced that samples from the asteroid Ryugu contain all five canonical 'letters' of DNA and RNA, suggesting widespread life-forming ingredients in the solar system.
Background
The discovery was made by a research team using samples returned by the Hayabusa2 mission. The analysis revealed a balanced ratio between purines and pyrimidines, a finding previously unrecorded in samples from asteroids like Bennu or various meteorites.
Facts for Prelims
- S&THayabusa2: A Japanese space mission that collected samples from the asteroid Ryugu.
- FactRyugu: An asteroid containing all five canonical 'letters' of DNA and RNA.
- S&TPurines and Pyrimidines: Chemical components found in a balanced ratio in Ryugu's asteroid dust.
For Mains
Q. Discuss how the study of extraterrestrial asteroids contributes to our understanding of the chemical evolution of life and the origins of biological molecules.
Dimensions to cover in your answer
- Chemical evolution: Evidence of life-forming ingredients in the solar system preceding planetary formation
- Analytical limitations: Distinction between presence of prebiotic molecules and evidence of past extraterrestrial life
Keywords: Astrobiology · Prebiotic Chemistry · Hayabusa2 · Organic Molecules · Space Exploration
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