The Origins of Life on the Earth |
From inside the book
Results 1-3 of 31
Page 74
... genetic DNA is preserved in single - stranded form , and the usual two - stranded form is synthesized only after infection . The genetic constancy of the virus is still assured , provided base - pairing is sufficiently accurate . This ...
... genetic DNA is preserved in single - stranded form , and the usual two - stranded form is synthesized only after infection . The genetic constancy of the virus is still assured , provided base - pairing is sufficiently accurate . This ...
Page 161
... genetic code . LIFE BASED ON NUCLEIC ACIDS AND PROTEINS We have seen that " organisms " without nucleic acids would lack the means of achieving genetic continuity , while organisms without proteins would be severely limited in their ...
... genetic code . LIFE BASED ON NUCLEIC ACIDS AND PROTEINS We have seen that " organisms " without nucleic acids would lack the means of achieving genetic continuity , while organisms without proteins would be severely limited in their ...
Page 165
... genetic apparatus , " Angew . Chem . Int . Ed . 11 , 798 ( 1972 ) . Extended discussions of the genetic code are given in : The Genetic Code , Cold Spring Harbor Symposium on Quantitative Biology , Volume 31 ( 1966 ) . C. R. Woese , The ...
... genetic apparatus , " Angew . Chem . Int . Ed . 11 , 798 ( 1972 ) . Extended discussions of the genetic code are given in : The Genetic Code , Cold Spring Harbor Symposium on Quantitative Biology , Volume 31 ( 1966 ) . C. R. Woese , The ...
Contents
PREBIOTIC SYNTHESIS OF PURINES PYRIMIDINES | 8 |
THE COMPOSITION | 12 |
GEOLOGICAL EVIDENCE | 16 |
Copyright | |
21 other sections not shown
Common terms and phrases
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