Cellular respiration is the food molecules or organic molecules are broken down to harvest chemical energy which is them stored in the chemical bonds of adenosine triphosphate (ATP) and all organism need energy to survive and continue their live .There are also occurs in three stages which are glycolysis, Krebs cycle and electron transport. Glycolysis is breakdown of 1 glucose(6C)molecule in a series enzyme catalyzed reactions into 2 molecules of pyruvate (3C).Krebs Cycle is complete the breakdown of pyruvate to Electron transport chain is electrons are transferred by NADH and through 4 major protein series to combine with oxygen producing water.Cellular respiration is the controlled breakdown organic molecules when the carbon hydrogen bonds of glucose broken and electron are be transferred to oxygen and transfer of electrons during chemical reaction releases energy stored in organic molecules. This released energy is ultimately used to synthesize ATP. Cellular respiration can be divide in two which is aerobic respirat
ion and anerobic respiration. Aerobic respiration is the process occurs in the presence oxygen and acts a final acceptor. An anaerobic respiration also known as fermentation process, occurs when oxygen is not present and on this part when divided more in alcoholic fermentation or lactic fermentation without no oxygen presence. The difference that two process is alcoholic fermentation produce three product which is ethanol, carbon dioxide and ATP while lactic acid fermentation produce only two product which is lactic acid and ATP energy).Fermentation is the process in the substances breaks down into a simpler substances. In this experiment the methylene blue is one of material as a redox indicator because that material(chemical),can lose or gain electrons from other substances The result what can get and see when methylene blue turned in blue is show that substance is oxidized and when turn colorless ,that show substances is reduce.This process when in the yeast cell will produces 2ATP,ethanol,product and carbon dioxide.