PNA World Hypothesis
It has been hypothesized that the earliest life on Earth may have used PNA as a genetic material due to its extreme robustness, simpler formation and possible spontaneous polymerization at 100°C (while water at standard pressure boils at this temperature, water at high pressure—as in deep ocean—boils at higher temperatures). If this is so, life evolved to a DNA/RNA-based system only at a later stage. Evidence for this PNA world hypothesis is however far from conclusive. See RNA world hypothesis for related information.
Read more about this topic: Peptide Nucleic Acid
Famous quotes containing the words world and/or hypothesis:
“This world is half the devil’s and my own,
Daft with the drug that’s smoking in a girl....”
—Dylan Thomas (1914–1953)
“The wheels and springs of man are all set to the hypothesis of the permanence of nature. We are not built like a ship to be tossed, but like a house to stand.”
—Ralph Waldo Emerson (1803–1882)