Bol'shinstvo biologicheskikh zadach nakhodyatsya v oblasti temperatur, gde kvantovye i klassicheskie effekty ravnotsenny ili v klassicheskoy oblasti, gde kvantovye effekty prostupayut kak neznachitel'nye dobavki ili modulyatsii. Stepen' proyavleniya kvantovogo i klassicheskogo rezhimov rassmotrena v rabote na primere odnoy iz vazhneyshikh zadach biologicheskoy aktivnosti molekul - zadachi o perekhodakh chastits cherez bar'ery. Podkhodya k zadache o perekhode chastitsy cherez nestatsionarnyy bar'er (s parametrami, kharakternymi dlya biologicheskikh problem) s razlichnykh pozitsiy (kvantovoy i klassicheskoy), my poluchili odinakovyy rezul'tat: dinamika chastitsy kharakterizuetsya relaksatsiey (ravnoraspredeleniem chastitsy mezhdu dvumya yamami bistabil'nogo potentsiala) za vremya, sravnimoe s diffuzionnym. The most part of biological tasks coincide with temperature areas, where quantum and classical effects are equivalent, or the classical one is dominating. The extent of influence of quantum or classical effect was considered in the work in application to one of the most significant problems of biological activity: particle transition through non-stationary barriers.