  The contribution of nucleon isobar $N^*$ exchanges to backward elastic
pd-scattering is calculated on the basis of deuteron 6q-model and found to be
negligible in comparison with the neutron exchange. It is shown that the pole
amplitude of neutron pickup from the deuteron $nN^*$-component is favoured in
the reaction $pd\to dN^*$ for backward going $N^*(1440)$ and $N^*(1710)$ at
kinetic energy of incident proton of 1.5--2 GeV whereas the triangular diagram
with subprocess $pp\to d\pi^+$ related to the usual $pn-$component of deuteron
is considerable suppressed.
