dna と は 簡単
A hydrogen bond often informally abbreviated h bond is a primarily electrostatic force of attraction between a hydrogen h atom which is covalently bound to a more electronegative atom or group and another electronegative atom bearing a lone pair of electrons the hydrogen bond acceptor ac. It is hydrogen bonds that are responsible for holding together such materials as paper and felted. Restriction enzymes recognize a specific sequence of nucleotides and produce a double stranded cut in the dna.



























































































