Which of the following is NOT a characteristic of k_cₐt/K_m? A)It corresponds to a second-order rate constant. B)It provides an excellent parameter for comparison of the catalytic efficiency of enzymes. C)It reflects the property of the enzyme when substrate concentration is at saturation. D)The upper limit for the k_cat/K_m value is fixed by the diffusion-controlled limit for reactions,which is 10⁹ M⁻¹ s⁻¹.

Question

Quizplus · Accepted Answer

Option C is incorrect because $k_{cat}/K_M$ reflects the enzyme's efficiency at low substrate concentrations, not at saturation. At saturation, the rate is determined by $k_{cat}$, not $k_{cat}/K_M$.

Which of the Following Is NOT a Characteristic of Kcₐt/Km

Which of the Following Is NOT a Characteristic of K_cₐt/K_m