Which organelle is the site of glucose oxidation to produce ATP in energy production?

Which organelle is the site of glucose oxidation to produce ATP in energy production?

• A. Mitochondria
• B. Chloroplast
• C. Ribosome
• D. Golgi Apparatus

Answer: (A)

Glucose oxidation to produce ATP is carried out mainly by cellular respiration inside mitochondria. After glycolysis in the cytosol, pyruvate enters the mitochondrion and is converted to acetyl-CoA, which feeds the citric acid cycle. This cycle generates NADH and FADH2 that feed the electron transport chain on the inner mitochondrial membrane. The electron flow creates a proton gradient used by ATP synthase to make ATP, so most of the cell’s ATP comes from this oxidative phosphorylation process in the mitochondria. Chloroplasts handle photosynthesis, not glucose oxidation; ribosomes build proteins, and the Golgi apparatus processes and ships molecules.

Glucose oxidation to produce ATP is carried out mainly by cellular respiration inside mitochondria. After glycolysis in the cytosol, pyruvate enters the mitochondrion and is converted to acetyl-CoA, which feeds the citric acid cycle. This cycle generates NADH and FADH2 that feed the electron transport chain on the inner mitochondrial membrane. The electron flow creates a proton gradient used by ATP synthase to make ATP, so most of the cell’s ATP comes from this oxidative phosphorylation process in the mitochondria. Chloroplasts handle photosynthesis, not glucose oxidation; ribosomes build proteins, and the Golgi apparatus processes and ships molecules.