The sequence of chemical reactions that occur during cellular respiration is known as the citric acid cycle or Krebs cycle. This process is crucial for converting food into usable energy in the form of ATP. Cellular respiration begins with the breakdown of glucose, followed by a series of reactions that release energy. It is typically divided into three main stages: glycolysis, the Krebs cycle, and the electron transport chain. Each stage plays a significant role in energy production and involves various enzymes that facilitate the reactions occurring in the mitochondria of eukaryotic cells.