Human: Where does the Krebs Cycle, or the Citric Acid Metabolism take place? Assistant: 
The Krebs cycle takes place in the mitochondria of cells. The Krebs cycle is a series of chemical reactions that occur in the mitochondria of cells. The Krebs cycle produces energy in the form of adenosine triphosphate (ATP), which is stored in the cell’s mitochondria. ATP is used by the cell to perform work, such as muscle contraction, or to store energy for later use.