Abstract: This paper reports the results of the simulating prebiotic syntheses with the HCN-H₂O, HCN-CH₄-H₂O, HCN-H₂S-CH₄-H₂O, CH₄-N₂-NH₃-H₂Oand CH,-N₂-NH₃-PH₃-H₂O gas mixtures. The fact which HCN can go back to atmosphere from water bodies has been further confirmed. The experimental results show that HCN is an important intermediate to synthesize biomolecules and that methane is responsible for the formation of the various skeletons of amino acids. The catalytic behaviour of hydrogen sulphide and phosphine on the prebiotic synthesis has been found.

Key words: Electric discharge, Origin of life, Prebiotic syntheses