or Krebs cycle or citric-acid cycle
Last stage of the chemical processes by which living cells obtain energy from foodstuffs.
Described by ATP . The enzymes that catalyze each step are located in mitochondria in animals, in chloroplast s in plants, and in the cell membrane in microorganisms. The hydrogen atoms and electrons that are removed from intermediate compounds formed during the cycle are channeled ultimately to oxygen in animal cells or to carbon dioxide in plant cells.