Suppose researchers discover a novel hexokinase which follows Michaelis-Menten kinetics in red blood cells. This new hexokinase has a Michaelis constant, KM, of approximately 60 μM. This novel hexokinase displays Michaelis- Menten kinetics. What concentration of blood glucose yields an initial velocity, Vo, equal to 90% of the maximal velocity, Vmax ? blood glucose concentration = What does the calculated substrate concentration at 90% Vmax tell you if normal blood glucose levels range between approximately 3.6 and 6.1 mM? Hexokinase normally operates far below Vmax. Hexokinase normally operates near Vmax. ☐ Hexokinase operates near Vmax only when glucose levels are low. Hexokinase operates near Vmax only when glucose levels are high. mM