Question
What is the correct order of the steps of cellular respiration?
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GPT-4o mini
The correct order of the steps of cellular respiration is as follows:
1. **Glycolysis**: This process occurs in the cytoplasm and breaks down glucose into pyruvate while producing a small amount of ATP and NADH.
2. **Pyruvate Oxidation**: This step occurs in the mitochondria, where pyruvate is converted into Acetyl-CoA, producing NADH and releasing carbon dioxide.
3. **Citric Acid Cycle (Krebs Cycle)**: Also occurring in the mitochondria, Acetyl-CoA enters the Krebs cycle, which generates additional NADH and FADH2, as well as ATP (or GTP) and more carbon dioxide.
4. **Electron Transport Chain (ETC)**: Located in the inner mitochondrial membrane, NADH and FADH2 donate electrons to the electron transport chain, leading to the generation of a proton gradient and the production of a significant amount of ATP via oxidative phosphorylation. Oxygen acts as the final electron acceptor, forming water.
These processes collectively convert glucose into ATP, which the cell uses for energy.
1. **Glycolysis**: This process occurs in the cytoplasm and breaks down glucose into pyruvate while producing a small amount of ATP and NADH.
2. **Pyruvate Oxidation**: This step occurs in the mitochondria, where pyruvate is converted into Acetyl-CoA, producing NADH and releasing carbon dioxide.
3. **Citric Acid Cycle (Krebs Cycle)**: Also occurring in the mitochondria, Acetyl-CoA enters the Krebs cycle, which generates additional NADH and FADH2, as well as ATP (or GTP) and more carbon dioxide.
4. **Electron Transport Chain (ETC)**: Located in the inner mitochondrial membrane, NADH and FADH2 donate electrons to the electron transport chain, leading to the generation of a proton gradient and the production of a significant amount of ATP via oxidative phosphorylation. Oxygen acts as the final electron acceptor, forming water.
These processes collectively convert glucose into ATP, which the cell uses for energy.
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