[Significance of chiral purity of biomolecules for self-reproduction of organisms].

Living systems mainly syntesise and utilise chiral pure polimers which have only one form of enantiomers (l, l,..., l-proteins, d, d, d,..., d-sugars). The biologycal meaning of chiral purity of molecules in organisms is discussed. It is shown that chiral purity of biomolecules is necessary to ensure ordering of organisms during selfreproduction. Even when formation of chiral pure form does not have any advantages over formation of a set of other stereoisomers, only chiral pure molecules may act as regulators of further syntheses. Molecules with distorded chiral purity are not able to maintain the initial order during selfreproduction.