Cellular Respiraton

Cellular respiration is a catabolic pathway in which the chemical energy of food molecules ar released and stored in get to of chemical bonds of glucose. Carbohydrates, lipids, and proteins are all acceptable fuel sources in cellular respiration, but glucose is preferable. (Tortora, 909). The energy in glucose is use to set off adenosine triphosphate (adenosine triphosphate), a high energy molecule, in which cells use to part over their energy demands. Cellular respiration occurs in trio master(prenominal) stages: glycolysis, Krebs cycle, and the electron transport chain. Cellular respiration takes puzzle in 2 phases, anaerobic and aerobic. The anaerobic phase takes hindquarters in the absence of oxygen, broken slash by a serial publication publication of catabolic reactions into pyruvic acrimonious. Each glucose molecule that is converted into a pyruvic acid molecule yields two molecules of adenosine triphosphate. The aerobic phase takes place in the pres ence of oxygen where glucose is completely broken down into ascorbic acid dioxide and water. Theses reactions generate 36 ATP molecules for eukaryotes and 38 ATP for prokaryotes (the 2 less ATP for eukaryotes has to do with the expenditure of pumping pyruvate into the mitochondrion). The real(a) signification of glycolysis is to split sugar, which is exactly what this carry out is accomplishing.

Glycolysis takes place in the cytoplasm and is an anaerobic process (does not take on oxygen) consisting of a 10-step metabolous pathway that converts one 6-carbon glucose molecule into into two 3-carbon molecules o f pyruvic acid. Even though glycolysis con! sumes two ATP molecules, it yields four authentic ATP molecules, for a net gain of two ATP molecules by substrate-level phosphorylation. Substrate-level phosphorylation is the process whereby a phosphate group is transferred outright to ATP. There are two stages. The first stage is the preparative stage in which two ATP molecules are used to phosphorylate one 6-carbon glucose and catabolize it into 3-carbon molecules. The energy conservation stage is which the two...If you take to get a full essay, order it on our website: BestEssayCheap.com

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