RNA: links para a hipotese do RNA-World


Mary Hales Mary Hales – 8/10/17

I am a biologist, and I have studied and observed microbial evolution first-hand. It has been established scientifically that RNA is the FiRST genetic molecule to form on Earth. RNA can store genetic information, serve as an enzyme like proteins, and help create both DNA and proteins. Later, DNA and proteins evolved and replaced this “RNA world” because they are more efficient at their respective functions, although RNA still exists and serves vital roles in biology. https://www.omicsgroup.org/journals/first-genetic-information-replication-in-life-origin-on-earth-2168-9296.1000e104.php?aid=6395https://www.merlot.org/merlot/viewMaterial.htm?id=85283 A 2016 study demonstrated for the first time ever that RNA molecules can form in alkaline hydrothermal chimneys. http://www.astrobio.net/news-exclusive/lifes-building-blocks-form-in-replicated-deep-sea-vents/http://online.liebertpub.com/doi/abs/10.1089/ast.2014.1280
E uma critica “criacionista” aos links acima:
+Mary Hales Sorry, you are dishonest, the RNA world hypothesis is NOT established scientifically. It is a widely contested hypothesis. The experiments in your links & Matt C ‘s links leave more questions unsolved than anything they have xplored. Most biologists think there must have been something like a cell right from the startdemonstrated. The articles even admit that. Quote “Most biologists think there must have been something like a cell right from the start”..end quote, Is taken directly from the link from Matt C in regards to the same experiments as your link covered. Do ‘activated nucleotides’ commonly exist in the inanimate environment? Even so, no RNA has ever been found in thermal vents in nature, nor has any evidence of their ancient existence & linear evolution into DNA been found. I would like to see a synthesised RNA molecule, self replicate into DNA? & then somehow the DNA program itself to manufacture its own RNA’s, proteins, cellular organelles, transcription & protein synthesis machinery?

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