Carbohydrates glycolysis

Under aerobic conditions, in which most cells grow, mitochondria are the site of (i) the tricarboxylic acid cycle which transforms (to carbon dioxide, water, and energy) the acetyl-CoA which is produced by the metabolism of both carbohydrates and fatty acids (ii) the enzymes that oxidize and convert fatty acids to acetyl-CoA (iii) the respiratory-chain enzymes which transmit, to atmospheric oxygen, the electrons removed from all the various metabolic substrates, and store part of the energy, obtained in this way, as adenosine triphosphate. The enzymes of carbohydrate glycolysis (the Meyerhof sequence) are in the cytoplasm. 

The fatty acids released on triacylglycerol hydrolysis are transported to mitochondria and degraded to acetyl CoA, while the glycerol is carried to the liver for further metabolism. In the liver, glycerol is first phosphorylated by reaction with ATP and then oxidized by NAD". The dihydroxyacetone phosphate (DHAP) that results enters the carbohydrate glycolysis pathway, which we ll discuss in Section 29.5. 

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