For the complete respiration of one molecule of glucose the citric acid cycle must earn a total of how many times?

For the complete respiration of one molecule of glucose, the citric acid cycle (Krebs cycle) operates twice. This is because one glucose molecule is broken down into two pyruvate molecules during glycolysis, and each pyruvate enters the citric acid cycle once. Therefore, the cycle earns a total of two turns for the complete oxidation of one glucose molecule.