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Related Experiment Videos

Handedness, origin of life and evolution.

V A Avetisov1, V I Goldanskii, V V Kuz'min

  • 1N.N. Semenov Institute of Chemical Physics of the USSR Academy of Sciences, Moscow.

Physics Today
|July 1, 1991
PubMed
Summary

Biological polymers possess inherent chirality and self-replication capabilities. This study explores the evolutionary origins of these properties, investigating which evolved first and the underlying mechanisms.

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Area of Science:

  • Biochemistry
  • Origin of Life Studies
  • Polymer Science

Background:

  • Biological polymers exhibit homochirality, a preference for specific stereoisomers.
  • Self-replication is a fundamental characteristic of life, enabling reproduction and evolution.

Purpose of the Study:

  • To investigate the evolutionary precedence between polymer chirality and self-replication.
  • To elucidate the physical mechanisms driving the emergence of these properties.

Main Methods:

  • Theoretical analysis using principles of statistical mechanics and physical chemistry.
  • Modeling of polymerization and replication processes under prebiotic conditions.

Main Results:

  • Physical constraints favor the emergence of homochirality prior to robust self-replication.
  • Chiral symmetry breaking can provide a pathway for the initial selection of one enantiomer.

Conclusions:

  • Chirality may be a prerequisite for the evolution of efficient self-replicating systems.
  • Understanding these early evolutionary steps is crucial for comprehending the origin of biological complexity.

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