The Enymatic Rate Constant (Kcat/Km)of Orotidine 5'-Phosphate Decarboxylase Is 6

question 7

Multiple Choice

The enymatic rate constant (kcat/Km) of orotidine 5'-phosphate decarboxylase is 6 × 10⁷ M-1s-¹ and the nonenzymatic rate constant (kn) is 3 × 10-¹⁶ s-¹.What is the value of the enzyme's catalytic proficiency?

• A) 2 x 10²³ M^-1
• B) 5 x 10^-24 M
• C) 12 x 10^-9 M^-1s^-2
• D) 8.3 x 10⁷ Ms²
• E) Cannot calcuate the profeciency without knowing the value Vmax.

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