4. During prolonged fasting, gluconeogenesis is critical for maintaining blood glucose. Which enzyme bypasses the irreversible step of glycolysis catalyzed by pyruvate kinase?
(A) Pyruvate carboxylase
(B) Phosphoenolpyruvate carboxykinase (PEPCK)
(C) Both A and B
(D) Fructose-1,6-bisphosphatase
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統計: A(2), B(0), C(1), D(1), E(0) #3577813
統計: A(2), B(0), C(1), D(1), E(0) #3577813