Many studies have demonstrated that such widely divergent organisms as E.coli, yeast, pigeons, and humans have virtually identical pathways for the biosynthesis of purinenucleotides thereby further demonstrating the biological unity of life. We are proposing the new suggestion about existing of close interrelationship, formed during evolution development of life, demonstrating the biological unity of life and also all organisms on earth are descended from a single common ancestor by following lawfull processess, as at first: ATP/ADP cycle functioned as one of parts of membrane - redox potentials three - state line system dependent - full 9 stepped cycle of proton conductance, at second: synthesize ATP from ADP and a phosphate group with participation of membrane - redox potentials three - state line system dependent - full 9 stepped cycle of proton conductance, at third: Identical pathways for the biosynthesis of purinenucleotides with participation of ATP generated within membrane - redox potentials three - state line system dependent - full 9 stepped cycle of proton conductance of widely divergent organisms as E.coli, yeast, pigeons, and humans, demonstrating the biological unity of life, at fourth: formation of the biological unity of life in the level of ATP/ADP cycle and also in the level of membrane - redox potentials three - state line system dependent - full 9 stepped cycle of proton conductance. The ATP/ADP cycle is very important factors of the biological unity of life and also is main part of membrane - redox potentials three - state line system dependent - full 9 stepped cycle of proton conductance. All living organisms have the same kinds of monomeric subunits and the identity of each organism is preserved by its possession of many sets of nucleic acids and of proteins, which formed with participation of ATP/ADP cycle functioned as one of members of membrane - redox potentials three - state line system dependent - full 9 stepped cycle of proton conductane. The ATP/ADP cycle is oxidative phosphorylation, which occurs in the inner mitochondrial membrane, which are functioned with participation of membrane - redox potentials three - state line system dependent - full 9 stepped cycle of proton conductane.