  The possible role of quantum effects in transfer of genetic information is
studied. It's argued that the nucleotides selection during DNA replication is
performed by means of proton tunneling between nucleotide and DNA-polimerase
bound by hydrogen bonds. Such mechanism is sensitive to the structure of
nucleotide hydrogen bonds, consequently only one nucleotide sort is captured by
DNA-polimerase in each event.The algorithm of this multistep selection
mechanism is also analysed from the point of its optimality. It's shown that
it's equivalent to Grover algorithm of data base search.
