Alternative Energy Sources




Points at which organic compounds enter the reaction stages of aerobic respiration. Complex carbohydrates are broken down into simple sugars, such as glucose. They become the substrates for glycolysis. If your body doesn't need to burn glucose for energy, glucose-6-phosphate can be converted to glycogen for storage. When blood sugar levels drop, glycogen is converted to glucose-6-phosphate and enters the glycolysis pathway. Most fats in your body are triglycerides. Enzymes separate them into glycerol and fatty acids. The carbon backbones of the fatty acid tails are broken apart and the fragments are converted into acetyl-CoA, which can enter the Krebs cycle. Enzymes split proteins into amino acids. The amino groups are removed from the carbon backbones and converted to ammonia, then urea. The urea is excreted in urine. The carbon backbones can enter the Krebs cycle at several different points.



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