Question
which stage of cellular respiration in the presence of oxygen produces ATP and NADH and releases CO2? glycolysis krebs cycle electron transport chain fermentation
Answers
GPT-4o mini
The stage of cellular respiration that occurs in the presence of oxygen and produces ATP and NADH while releasing CO2 is the **Krebs cycle** (also known as the citric acid cycle or TCA cycle).
Here’s a brief overview of the processes:
- **Glycolysis**: Occurs in the cytoplasm, produces a small amount of ATP and NADH, but does not release CO2.
- **Krebs Cycle**: Takes place in the mitochondrial matrix, produces ATP, NADH, and FADH2, and releases CO2 as a byproduct.
- **Electron Transport Chain**: Occurs in the inner mitochondrial membrane, primarily produces ATP but does not produce NADH or release CO2.
- **Fermentation**: An anaerobic process that occurs in the absence of oxygen, does not produce CO2 and generally results in less ATP than aerobic respiration.
Thus, the correct answer is the **Krebs cycle**.
Here’s a brief overview of the processes:
- **Glycolysis**: Occurs in the cytoplasm, produces a small amount of ATP and NADH, but does not release CO2.
- **Krebs Cycle**: Takes place in the mitochondrial matrix, produces ATP, NADH, and FADH2, and releases CO2 as a byproduct.
- **Electron Transport Chain**: Occurs in the inner mitochondrial membrane, primarily produces ATP but does not produce NADH or release CO2.
- **Fermentation**: An anaerobic process that occurs in the absence of oxygen, does not produce CO2 and generally results in less ATP than aerobic respiration.
Thus, the correct answer is the **Krebs cycle**.