Byd RNA

Byd RNA
Enghraifft o:scientific hypothesis Edit this on Wikidata
Mathoes, hypothetical scientific object Edit this on Wikidata
Rhan ohistory of life Edit this on Wikidata
Dechreuwyd1968 Edit this on Wikidata
Dynodwyr
Freebase/M/06fcw edit this on wikidata
QuoraRna-world-hypothesis edit this on wikidata

Mae'r term Byd RNA yn cyfeirio at y ddamcaniaeth mai RNA oedd y moleciwl gyntaf i fod yn hunan atgynhyrchiol wrth i fywyd ymddangos ar y ddaear[1][2]. Roedd Francis Crick, ag eraill, wedi sylweddoli ei fod yn annhebygol mai DNA a fyddai'n ateb y galw yma. Mae'r term "Byd RNA" yn cyfeirio at y cyfnod hanesyddol (tua 4 mil miliwn o flynyddoedd cyn y presennol (CP)), cyn i'r gyfundrefn bresennol o DNA gychwyn.

Cyfeiriadau

  1. ↑ (Saesneg) Shelley D. Copleya,Eric Smithb & Harold J. Morowitzc (2007) The origin of the RNA world: Co-evolution of genes and metabolism. Bioorganic Chemistry 35, 430–443 doi:10.1016/j.bioorg.2007.08.001 http://www.sciencedirect.com/science/article/pii/S004520680700051X sciencedirect.com;] darllenwyd 9 Mehefin 2016
  2. ↑ (Saesneg) Carl Zimmer "A Tiny Emissary From the Ancient Past". New York Times. September 25, 2014. darllennwyd 9 Mehefin 2016

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