The possibilities of describing the kinetics of the copolymer formatio
n and the structure using the concept of bond blocks were analyzed. Te
rminal bond blacks were suggested as the components of the kinetic sch
eme. It was shown that for sufficiently complex systems enough (more t
han two comonomers), only this approach enables the application of the
law of mass action to its full extent. The likely mechanism of the sp
ecific synthesis of bond blocks in biopolymers is discussed.