Answer B (correct answer): Km is the concentration of substrat | Usmle materials 2020

Answer B (correct answer): Km is the concentration of substrate when reaction velocity (V) is one half of Vmax. From the data table, Vrnax is
3.75mol/min. One half of Vmax is l.9mol/min. The data table shows a concentration of 0.Sg/ml at velocity of 2mol/min. Thus, Km is a number slightly
less than 0.5.