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:
“How do you know what the world is like? Do you know the world is a foul sty? Do you know if you rip the fronts off houses you’d find swine? The world is a hell. What does it matter what happens in it?”
—Thornton Wilder (1897–1975)
“Oversimplified, Mercier’s Hypothesis would run like this: “Wit is always absurd and true, humor absurd and untrue.””
—Vivian Mercier (b. 1919)