For an enzyme which conforms Henri-Michaelis-Menten kinetics,
1) At what substrate concentration will an enzyme characterized by the kcat of 30 s-1 and Km of 0.005 M show one quarter of its maximal rate?
2) Compute the fraction of Vmax which would be found when [S] = 0.5 Km, [S] = 3Km and [S] = 10Km