Chemistry

Chemistry

Problem

Consider the following two reactions that occur in cellular metabolism: (1) Glucose + Pi→+\,\text{P}_\text{i} \rightarrow Glucose-6-P ΔG∘=+13.8 kJ mol−1\Delta G^\circ = +13.8\,\text{kJ mol}^{-1} (2) ATP →\rightarrow ADP + Pi+\,\text{P}_\text{i} ΔG∘=−30.5 kJ mol−1\Delta G^\circ = -30.5\,\text{kJ mol}^{-1} When these reactions are coupled so that inorganic phosphate (Pi\text{P}_\text{i}) does not appear in the overall equation, what is the standard free-energy change for the net formation of Glucose-6-P from glucose and ATP? a) +44.3 kJ mol−1+44.3\,\text{kJ mol}^{-1} b) −30.5 kJ mol−1-30.5\,\text{kJ mol}^{-1} c) −16.7 kJ mol−1-16.7\,\text{kJ mol}^{-1} d) +16.7 kJ mol−1+16.7\,\text{kJ mol}^{-1}

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