  We have studied the scaling properties of the electromagnetic response
functions of $^4$He and $^{12}$C nuclei computed by the Green's Function Monte
Carlo approach, retaining only the one-body current contribution. Longitudinal
and transverse scaling functions have been obtained in the relativistic and non
relativistic cases and compared to experiment for various kinematics. The
characteristic asymmetric shape of the scaling function exhibited by data
emerges in the calculations in spite of the non relativistic nature of the
model. The results are consistent with scaling of zeroth, first and second
kinds. Our analysis reveals a direct correspondence between the scaling and the
nucleon-density response functions.
