The Origins of Life on the Earth |
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Page 45
... important on the primitive earth , act on a mixture of CH4 and H2O to form CO2 and CO . 2 3. The proportions of CH4 , CO , and CO2 at equilibrium are pressure dependent . Lowering the pressure increases the ratio of CO2 to CH4 . If ...
... important on the primitive earth , act on a mixture of CH4 and H2O to form CO2 and CO . 2 3. The proportions of CH4 , CO , and CO2 at equilibrium are pressure dependent . Lowering the pressure increases the ratio of CO2 to CH4 . If ...
Page 59
... important in the oceans , since many photochemical transformations in solution do not require large amounts of ... important source of hydrogen cyanide and hence of those prebiological organic compounds formed from it . Later we shall ...
... important in the oceans , since many photochemical transformations in solution do not require large amounts of ... important source of hydrogen cyanide and hence of those prebiological organic compounds formed from it . Later we shall ...
Page 68
... important group of amino acids are the polar amino acids— aspartic acid , glutamic acid , lysine , arginine , and histidine . These residues play an important role in determining the solubility and polyelectrolyte properties of proteins ...
... important group of amino acids are the polar amino acids— aspartic acid , glutamic acid , lysine , arginine , and histidine . These residues play an important role in determining the solubility and polyelectrolyte properties of proteins ...
Contents
PREBIOTIC SYNTHESIS OF PURINES PYRIMIDINES | 8 |
THE COMPOSITION | 12 |
GEOLOGICAL EVIDENCE | 16 |
Copyright | |
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abundant active adenine alanine aldehydes amino acids ammonia ammonium amounts anticodon aqueous solution aspartic acid biochemical biological CaCO3 carbon CH₂ chain chemical chert CO₂ concentration condensation contain COOH cyanoacetylene cytosine decomposition dust cloud electric discharge energy enzyme equilibrium escape layer evolution example formaldehyde formation formed gases genetic geological glutamic acid glycine H₂ H₂N H₂O hydrocarbons hydrogen cyanide hydrolysis hydrolyzed important inorganic L. E. Orgel limestone living organisms material mechanism membranes metabolism meteorites methane minerals mixture molecules N₂ NH₂ nitrogen nucleic acids nucleotides O₂ obtained occur organic compounds origin oxidation oxygen pathways peptide phosphate phosphorylation photochemical photosynthesis planets polymers polynucleotides polypeptides prebiotic prebiotic synthesis Precambrian present pressure primitive atmosphere primitive earth primitive ocean purines reaction replication rocks Schopf Science sequence solar system structure sugars surface t-RNA temperature ultraviolet light volcanoes yield