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SOLVED:A certain metabolic pathway can be diagrammed as where A, B, C, and D are the intermediates, and X, Y, and Z are the enzymes that catalyze the reactions. The physiological free energy changes for the reactions are X -0.2 kJ·mol^-1 Y -12.3 kJ·mol^-1 Z -1.2 kJ·mol^-1 (a) Which reaction is likely to be a major regulatory point for the pathway? (b) If your answer in Part a was in fact the case, in the presence of an inhibitor that blocks the activity of enzyme Z, would the