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:
“Six years of such small preoccupations!
Six years of shuttling in and out of this place!
O my hunger! My hunger!
I could have gone around the world twice
or had new children all boys.”
—Anne Sexton (1928–1974)
“The great tragedy of science—the slaying of a beautiful hypothesis by an ugly fact.”
—Thomas Henry Huxley (1825–95)