Chapter 3, Problem 15P

Answers to all problems are at the end of this book. Detailed solutions are available in the Student Solutions Manual, Study Guide, and Problems Book.

Assessing the Effect of pH on Metabolic Reactions The difference between $\Delta G^{\circ }$and $\Delta G^{\circ }$' was discussed in Section 33. Consider the hydrolysis of acetyl phosphate (Figure T9) and determine the value of $\Delta G^{\circ }$for this reaction at pH 2,7, and 12. The value of $\Delta G^{\circ }$for the enolase reaction (Figure 3.10) is 1.8 kJ/mol. What is the value of $\Delta G^{\circ }$for enolase at pH 2, 7, and 12? Why is this case different from that (if acetyl phosphate?