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).
Respiration generates more ATP normally 34 ATP while ATP produced by fermentation is 2 ATP that is many time less as compare to ATP produces by respiration. Respiration (cellular) is aerobic while fermentation is anaerobic. Oxygen is used in respiration while it is not used in fermentation. In fact, fermentation occurs due to absence of oxygen. Respiration involves the usage of enzymes such as glucose. Cellular respiration is more efficient tin in producing ATP as compare to fermentation.