The oxidation of 1 mol of the C16 fatty acid, palmitate, generates how many ATP molecules?
**Core Concept**
The oxidation of fatty acids in the mitochondria produces ATP through the citric acid cycle and oxidative phosphorylation. Palmitate, a C16 fatty acid, undergoes beta-oxidation to produce acetyl-CoA, which then enters the citric acid cycle.
**Why the Correct Answer is Right**
During the oxidation of palmitate, 8 molecules of acetyl-CoA are produced, each of which enters the citric acid cycle. In the citric acid cycle, each acetyl-CoA molecule generates 1 FADH2 and 1 NADH. These electrons are then passed through the electron transport chain, producing 32 ATP molecules (10 from FADH2 and 22 from NADH). However, for every acetyl-CoA molecule entering the citric acid cycle, 1 GTP is also produced. Therefore, the total ATP yield from the oxidation of 1 mol of palmitate is 106 (32 from the electron transport chain + 8 from GTP).
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it doesn't take into account the production of GTP during the citric acid cycle.
* **Option B:** This option is incorrect because it underestimates the ATP yield from the electron transport chain.
* **Option C:** This option is incorrect because it doesn't take into account the production of GTP during the citric acid cycle and overestimates the ATP yield from the electron transport chain.
**Clinical Pearl / High-Yield Fact**
Remember the "8-10-22" rule for the ATP yield from fatty acid oxidation: 8 acetyl-CoA molecules produce 10 FADH2 and 22 NADH molecules, which generate 32 ATP molecules.
**Correct Answer:** D. 106