Enzymes located in the mitochondrial matrix most directly facilitate which metabolic process?

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Multiple Choice

Enzymes located in the mitochondrial matrix most directly facilitate which metabolic process?

Explanation:
The mitochondrial matrix is where the citric acid cycle runs. Enzymes in this space oxidize acetyl-CoA and regenerate oxaloacetate, producing NADH and FADH2 in the process. These electron carriers then feed the electron transport chain located in the inner mitochondrial membrane to drive ATP production. Other pathways mentioned occur outside the matrix—glycolysis and fermentation in the cytosol, and oxidative phosphorylation mainly across the inner membrane rather than in the matrix itself. So the enzymatic activity most directly associated with the matrix is the citric acid cycle.

The mitochondrial matrix is where the citric acid cycle runs. Enzymes in this space oxidize acetyl-CoA and regenerate oxaloacetate, producing NADH and FADH2 in the process. These electron carriers then feed the electron transport chain located in the inner mitochondrial membrane to drive ATP production. Other pathways mentioned occur outside the matrix—glycolysis and fermentation in the cytosol, and oxidative phosphorylation mainly across the inner membrane rather than in the matrix itself. So the enzymatic activity most directly associated with the matrix is the citric acid cycle.

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