Problem 12,135 - excreting 40 g of urea in the same time...

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Problem 12 (Due May 25 th ) a) Production of the enzymes that catalyze the reactions of the urea cycle can increase or decrease according to the metabolic needs of the organism. High levels of these enzymes are associated with both high-protein diets and starvation. Explain this apparent paradox. b) An adult individual on a particular diet expends 10,000 kJ of energy per day, while
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Unformatted text preview: excreting 40 g of urea in the same time period. Assuming that protein is 16 percent nitrogen by weight and that its metabolism produces 18 kJ of energy per gram of protein ingested, what percent of the individual’s energy requirement is met by protein?...
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This note was uploaded on 09/08/2010 for the course CHEM 135 at San Jose State University .

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