  We revisit the QCD+QED axial anomaly low-energy theorems which give an exact
relation between the matrix elements of the gluon and photon parts of the axial
anomaly operator equation within the framework of the {\em effective action}
derived from the instanton vacuum. The matrix elements between the vacuum and
two photon states and between the vacuum and two gluon states are investigated
for arbitrary $N_f $ in the chiral limit. Having gauged the effective action
properly, we show that the model does exactly satisfy the low-energy theorems.
