Biochemistry Question CM-22


A 15 year-old patient complains of painful muscle cramps when performing physical exercise, followed by stiffness and weakness, and excretion of wined colored urine. A muscle biopsy indicates a muscle glycogen concentration much higher than normal. Deficit of which of the following enzymes is most likely causing these problems in this patient?


a) Creatin kinase


b) ATP synthase


c) Glycogen phosphorylase


d) Glycogen synthase


e) Glucose 6 phosphatase


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