Vmax is the maximum rate of an enzyme catalysed reaction i.e. when the enzyme is saturated by the substrate. Km is measure of how easily the enzyme can be saturated by the substrate. Km and Vmax are constant for a given temperature and pH and are used to characterise enzymes.

What is the V Vmax ratio when S 4 km?

v (umol/minv (umol/min)310.44.1514.56.41022.511.33033.822.6

Is Vmax higher than KM?

For the competitive inhibitor, Vmax is the same as for the normal enzyme, but Km is larger. For the noncompetitive inhibitor, Vmax is lower than for the normal enzyme, but Km is the same.