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?

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#Question id: 587

#Section 2: General Biology

The concentrations of enzymes are determined by using pseudo first-order conditions in which

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#Question id: 588

#Section 2: General Biology

The initial velocity of an enzyme reaction (v0) describes

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#Question id: 589

#Section 2: General Biology

When varying the substrate concentration at a fixed concentration of enzyme it is observed that at low concentrations of substrate the reaction is ________,while at high concentrations of substrate the reaction is ________.

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#Question id: 590

#Section 2: General Biology

Which enzyme below is fastest?

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#Question id: 591

#Section 2: General Biology

The Michaelis constant, Km, is equal to the ________.

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#Question id: 592

#Section 2: General Biology

The expression: Vmax = k2[E]total applies to