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Review Question - QID 109312

Enzyme Kinetics Enzymes Kinetics Michaelis-Menten Equation QID: 109312 (M1.PH.17.4799)
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QID 109312 (Type "109312" in App Search)
A 55-year-old man presents to clinic complaining of erectile dysfunction. He states that he does not experience nocturnal tumescence based on prior testing. The patient does not take nitrate medications, so he is prescribed a drug for symptomatic relief. The drug binds to the same active site on the phosphodiesterase-5 enzyme as cGMP to prevent the enzyme from working. Assuming the patient’s pre-medication baseline is demonstrated on Curve A, which of the following curves (Figure A) shows the patient’s enzyme activity after drug administration?
  • A
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  • A