The enymatic rate constant k_cat/K_m) of orotidine 5ʹ-phosphate decarboxylase is 6 x 10⁷ M^-¹s^-¹and the nonenzymatic rate constant k_n) is 3 x 10^-¹⁶s^-¹. What is the value of the enzymeʹs catalytic proficiency? A) 2 x 10²³M^-¹ B) 5 x 10^-²⁴M C) 12 x 10^-⁹M^-¹s^-² D) 8.3 x 10⁷Ms² E) Cannot calculate the proficiency without knowing the value of V_max.

Question

Quizplus · Accepted Answer

The catalytic proficiency is calculated as (k_cat/K_m) / k_n. Substituting the given values: (6 x 10^7 M^-1s^-1) / (3 x 10^-16 s^-1) = 2 x 10^23 M^-1.

The Enymatic Rate Constant Kcat/Km) of Orotidine 5ʹ-Phosphate Decarboxylase Is

The Enymatic Rate Constant K_cat/K_m) of Orotidine 5ʹ-Phosphate Decarboxylase Is