Which of the following is NOT true of bypass reactions that are used to reverse a metabolic pathway? The have ?G ? 0 They must maintain the same change in oxidation state of the carbon substrate as the reaction they reverse An effective bypass reaction for a sugar kinase is a sugar phosphatase It may require multiple reactions in a reverse pathway to bypass what was one reaction in the forward pathway They are usually the most highly regulated steps in a metabolic pathway
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The have $\Delta G = 0$: This statement is not true. Bypass reactions do not necessarily have $\Delta G = 0$. They can have positive or negative Gibbs free energy changes depending on the reaction conditions. Show more…
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Which of the following is true of far-from-equilibrium reactions in metabolic pathways? a. Substrate concentrations are high enough to saturate the enzyme, so the reverse reaction is nearly impossible. b. The forward and reverse reactions are catalyzed by the same enzymes. c. Each step in the pathway contributes equally to determining the overall rate of flux through the pathway. d. The first step of the pathway is always the committed step.
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