The citric acid cycle, also known as the Krebs cycle or the tricarboxylic acid cycle, is a series of chemical reactions that generate energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins into carbon dioxide and chemical energy in the form of adenosine triphosphate ATP . The cycle occurs in the mitochondria of eukaryotic cells.Per turn of the citric acid cycle, the following high-energy molecules are produced:- 1 ATP via substrate-level phosphorylation - 3 NADH reduced nicotinamide adenine dinucleotide - 1 FADH2 reduced flavin adenine dinucleotide The NADH and FADH2 molecules produced in the citric acid cycle are used in oxidative phosphorylation to generate ATP. In the electron transport chain, NADH generates approximately 2.5 ATP molecules per NADH, while FADH2 generates approximately 1.5 ATP molecules per FADH2.Thus, per turn of the citric acid cycle and oxidative phosphorylation, the total ATP production is as follows:- 1 ATP from substrate-level phosphorylation - 3 NADH 2.5 ATP/NADH = 7.5 ATP- 1 FADH2 1.5 ATP/FADH2 = 1.5 ATPTotal ATP production per turn of the citric acid cycle and oxidative phosphorylation is approximately 10 ATP molecules. However, it's important to note that the actual ATP yield may vary slightly depending on the efficiency of the electron transport chain and the specific cell type.