Definition and synonyms of key from the online English dictionary from Macmillan Publishers Limited.
Cellular respiration is the set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products.his potential is then used to drive ATP synthase and produce ATP from ADP and a phosphate group. Biology textbooks often state that 38 ATP molecules can be made per oxidised glucose molecule during cellular respiration (2 from glycolysis, 2 from the Krebs cycle, and about 34 from the electron transport system).
ATP (adenosine triphosphate) is required in all living cells as a continual supply of energy, to be used in processes, which keep the organism alive such as muscle contraction. ATP is made up of three main components, the base (adenine), a phosphate chain (made of three phosphate groups) and a ribose sugar backbone. The energy released from the respiration of Glucose is used to add inorganic phosphate groups to ADP to form ATP. Below is a diagram of ATP. The first step in the production of ATP and the store of energy is Glycolysis, which occurs in both aerobic and anaerobic respiration.