* Krebs Cycle (also known as the Citric Acid Cycle): This cycle produces 1 ATP molecule directly per pyruvate molecule. However, it's important to remember that the Krebs Cycle is only *part* of cellular respiration.
* Cellular Respiration as a whole: If we consider the entire process of cellular respiration, which includes glycolysis, the Krebs Cycle, and oxidative phosphorylation, the yield is much higher. From the breakdown of *one* glucose molecule (which creates *two* pyruvate molecules), you get approximately 38 ATP molecules.
So, the answer depends on what you're asking about:
* Krebs Cycle only: 1 ATP per pyruvate
* Full Cellular Respiration: Approximately 19 ATP per pyruvate (since one glucose yields two pyruvate)
Let me know if you'd like more detail about any specific part of the process!