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    Principles of Biochemistry Study Set 1
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    Exam 5: Properties of Enzymes
  5. Question
    The Enymatic Rate Constant K<sub>cat</sub>/K<sub>m</sub>) of Orotidine 5ʹ-Phosphate Decarboxylase Is
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The Enymatic Rate Constant Kcat/Km) of Orotidine 5ʹ-Phosphate Decarboxylase Is

Question 19

Question 19

Multiple Choice

The enymatic rate constant kcat/Km) of orotidine 5ʹ-phosphate decarboxylase is 6 x 107 M-1s-1 and the nonenzymatic rate constant kn) is 3 x 10-16 s-1. What is the value of the enzymeʹs 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 calculate the proficiency without knowing the value of Vmax.

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