Each of these reactions is involved in one of the four stages of metabolism shown in Figure 21.4. Identify the stage in which each reaction occurs.

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a. Hydrolysis of starch to produce glucose

Each of these reactions is involved in one of the four stages of metabolism shown in Figure 21.4. Identify the stage in which each reaction occurs.

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b. Oxidation of NADH coupled with synthesis of ATP

Each of these reactions is involved in one of the four stages of metabolism shown in Figure 21.4. Identify the stage in which each reaction occurs.

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c. Conversion of glucose to acetyl-CoA

Arrange the following events in the order in which they occur in a catabolic process: electron transport, digestion, oxidative phosphorylation, citric acid cycle.

What key metabolic intermediate is formed from the catabolism of all three major classes of foods: carbohydrates, lipids, and proteins?

Why is ∆G a useful quantity for predicting the favorability of biochemical reactions?

The following reactions occur during the catabolism of glucose. Which are exergonic? Which is endergonic? Which proceeds farthest toward products at equilibrium?

b. Phosphoenol pyruvate + H₂O → Pyruvate + Phosphate(P_i)

∆G = –14.8 kcal/mol (–61.9 kJ/mol)