What value of [S], as a fraction of K_M, is required to obtain 20% V_max? [S] equals: A) 0.2 K_M B) 0.25 K_M C) 0.5 K_M D) 0.75 K_M E) 0.8 K_M

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To achieve 20% of Vmax in a Michaelis-Menten enzyme kinetics scenario, the substrate concentration [S] must be 0.25 times the Michaelis constant (Km), because V = Vmax[S]/(Km + [S]), and at [S] = 0.25Km, the equation simplifies to V = 0.2Vmax.

What Value of [S], as a Fraction of KM, Is

What Value of [S], as a Fraction of K_M, Is