  The nucleon-nucleon interaction at short range is analyzed in terms of
six-quark configurations on a base of numerical solutions of modified RGM
equations. It is shown that in low partial waves L=0,1 the system has a
two-channel character: the $NN$ channel and the inner six-quark state ("bag")
with specific color-spin structure. Starting from this analysis it is shown
that polarization observables could be a good tool for investigation of a quark
structure of the deuteron.
