The citric acid cycle, also known as the Krebs cycle or TCA cycle, plays a crucial role in cellular respiration. This cycle primarily takes place in the mitochondria of cells and is vital for converting carbohydrates, fats, and proteins into energy.
During one turn of the citric acid cycle, the following key products are generated:
- ATP (Adenosine Triphosphate): The cycle produces 1 ATP directly per cycle through substrate-level phosphorylation.
- NADH: A total of 3 NADH molecules are produced, which are important electron carriers that transport electrons to the electron transport chain, leading to further ATP production.
- FADH2: 1 molecule of FADH2 is generated, another electron carrier that will also contribute to ATP production in the electron transport chain.
- CO2 (Carbon Dioxide): Two molecules of CO2 are released as waste products during the cycle.
Overall, the citric acid cycle is integral to the energy metabolism of the cell, as it not only produces ATP but also various carrier molecules that facilitate further ATP synthesis in aerobic respiration.