1. ATP (Adenosine Triphosphate): This is the primary energy currency of cells. The Krebs cycle produces one ATP molecule per turn.
2. Reduced Electron Carriers: The cycle produces three molecules of NADH (Nicotinamide adenine dinucleotide) and one molecule of FADH2 (Flavin adenine dinucleotide) per turn. These molecules are crucial for the electron transport chain, the next stage of cellular respiration, where they will donate their electrons to generate a significant amount of ATP.
3. Carbon Dioxide (CO2): The Krebs cycle releases two molecules of CO2 per turn. This represents the oxidation of carbon from the original glucose molecule, and the CO2 is a waste product that is exhaled.
4. Precursors for Biosynthesis: The cycle also produces intermediates that are used as building blocks for other important molecules, including:
* Oxaloacetate: Used in gluconeogenesis (synthesis of glucose from non-carbohydrate sources).
* α-Ketoglutarate: Used in amino acid biosynthesis.
In summary: The Krebs cycle is a central metabolic hub that produces energy in the form of ATP, reduced electron carriers, and carbon dioxide. It also provides essential building blocks for various biosynthetic pathways.
