  It is shown that the combination of the structure functions $F_2$ predicted
by the CKMT model at low and moderate values of $Q^2$ and MRS99 parton
distribution functions at high $Q^2$ gives a good description of the data over
complete measured region of $x$ and $Q^2$. Using these structure functions the
main characteristics of the muon-nucleus inelastic scattering are calculated.
Nuclear effects and contributions of the neutral current and $\gamma - Z$
interference are taken into account.
