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【单选题】
A runner ’ s muscles use glucose as a source of energy. Muscle contains glycogen stores that are degraded into glucose 1-phosphate via glycogen phosphorylase, which is an allosteric enzyme. Assume that an allosteric enzyme has the following kinetic properties: a Vmax of 25 U/mg enzyme and a Km,app of 1.0 mM. These kinetic parameters were then measured in the presence of an allosteric activator. Which one of the following would best describe the findings of that experiment?A.
A Vmax of 25 U/mg enzyme and a Km,app of 0.2 mM
B.
A Vmax of 15 U/mg enzyme with a Km,app of 2.0 mM
C.
A Vmax of 25 U/mg enzyme with a Km,app of 2.0 mM
D.
A Vmax of 50 U/mg enzyme with a Km,app of 5.0 mM
E.
A Vmax of 50 U/mg enzyme with a Km,app of 10.0 mM
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