  Natural supports of information are given by random copolymers such as DNA or
RNA where information is coded in the sequence of covalent bonds. At the
molecular scale, the stochastic growth of a single copolymer with or without a
template proceeds by successive random attachments or detachments of monomers
continuously supplied by the surrounding solution. The thermodynamics of
copolymerization shows that fundamental links already exist between information
and thermodynamics at the molecular scale, which opens new perspectives to
understand the dynamical aspects of information in biology.
