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Carbon dioxide production pentose phosphate pathway

The major pathway of catabolism of monosaccharides, such as glucose and fructose, is glycolysis. Monosaccharides are converted into pyruvate with the generation of ATP [6]. Pyruvate is an intermediate in several metabolic pathways, but the majority of it is converted to acetyl coenzyme A, which enters the citric acid cycle. Although more ATP is generated in the citric acid cycle, the most important product is NADH, which is derived from NAD+ as the acetyl coenzyme A is oxidized. This oxidation releases carbon dioxide as a waste product. An alternative route for glucose catabolism is the pentose phosphate pathway, in which pentose sugars such as ribose is produced. [Pg.229]

Three distinct but integrated pathways are responsible for the breakdown of glucose and its conversion to carbon dioxide, water and utilizable energy. They are (1) the glycolytic or Embden-Meyerhof pathway, (2) the citrate cycle and electron-transport chain which provide the final common pathway for the products of carbohydrate, lipid and amino acid metabolism (3) the pentose phosphate pathway. [Pg.225]

Carbon turnover in terrestrial ecosystems is mostly linked to biochemical reactions of three types of organisms. Primary biomass is produced by autotrophic organisms, mainly plants. Their biomass is transformed into new but chemically similar secondary biomass of consumers. These are connected by trophic relations in food chains and carbon recycling systems. Nonliving biomass is again mineralized by decomposers to carbon dioxide, water, and minerals. The basic biochemical pathways such as glycolysis, the pentose-phosphate cycle (Calvin cycle), and the Krebs cycle are for all organisms nearly identical. Only a few main biochemical pathways produce metabolites for biomass production, in particular cell walls. [Pg.201]


See other pages where Carbon dioxide production pentose phosphate pathway is mentioned: [Pg.140]    [Pg.313]    [Pg.517]    [Pg.604]    [Pg.604]    [Pg.517]    [Pg.175]    [Pg.445]    [Pg.445]    [Pg.669]    [Pg.366]   
See also in sourсe #XX -- [ Pg.340 ]




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Pentose phosphate pathway

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