6 __ How many ATP molecules are produced in the mitochondrial matrix when two glucose molecules are broken down? __ 2. 2 3. 4 4. 68 5. 34

The correct answer is 5. 34.<br /><br />When two glucose molecules are broken down in the mitochondrial matrix, a total of 34 ATP molecules are produced.<br /><br />Here's a brief explanation:<br /><br />1. The breakdown of one glucose molecule in the mitochondrial matrix produces a net gain of 2 ATP molecules.<br /><br />2. This process involves the following steps:<br /> - Glycolysis: 2 ATP molecules are used, and 4 ATP molecules are produced, resulting in a net gain of 2 ATP.<br /> - Citric acid cycle (Krebs cycle): 2 ATP molecules are produced.<br /> - Electron transport chain: 30 ATP molecules are produced.<br /><br />3. Therefore, when two glucose molecules are broken down, the total ATP produced in the mitochondrial matrix is 2 x 2 = 4 ATP (from glycolysis) + 4 ATP (from the citric acid cycle) + 30 ATP (from the electron transport chain) = 34 ATP.<br /><br />So, the correct answer is 5. 34 ATP molecules are produced in the mitochondrial matrix when two glucose molecules are broken down.