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Enzymes a and B Catalyze Different Reactions, but Use the Same

Question 61

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Enzymes A and B catalyze different reactions, but use the same reactant molecule as a substrate.The graph in Figure 3-74 presents the reaction rates observed when enzyme A and enzyme B are mixed together in a single test tube containing molecule X.What are the Vmax and the apparent Km values for each enzyme under these conditions? How might these values change for enzyme B if it were analyzed in the absence of enzyme A? Explain your answer. (A)
x⇌AYX⇌Bz\begin{array} { l } x \stackrel { A } { \rightleftharpoons } Y \\X \stackrel { B } { \rightleftharpoons } z\end{array}

(B)
Enzymes A and B catalyze different reactions, but use the same reactant molecule as a substrate.The graph in Figure 3-74 presents the reaction rates observed when enzyme A and enzyme B are mixed together in a single test tube containing molecule X.What are the V<sub>max</sub> and the apparent K<sub>m</sub> values for each enzyme under these conditions? How might these values change for enzyme B if it were analyzed in the absence of enzyme A? Explain your answer. (A) \begin{array} { l } x \stackrel { A } { \rightleftharpoons } Y \\ X \stackrel { B } { \rightleftharpoons } z \end{array} (B) Figure 3-74
Figure 3-74

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Under the mixed conditions, enzyme A has...

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