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4-Krebs - Problem Set-4Krebs Cycle 1 A biochemist wishes to...

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Problem Set-4—Krebs Cycle 1. A biochemist wishes to measure the amount of P i in a solution. He selects an enzyme from the Krebs cycle to add to that solution because, he says, it will use the P i , and the level of the product, which he can measure, could be related to the amount of P i originally present. Show the balanced equation for the reaction catalyzed by the enzyme he chooses. 2. Name a reaction in the Krebs cycle that is chemically similar to the reaction that produces phosphoenolpyruvate in glycolysis. Explain your answer. 3. Much is made of the need for an organism to accumulate "reducing power" from its nutrients in order to synthesize needed reduced compounds. To what extent does the metabolism of glucose to CO 2 and H 2 O via glycolysis, the Krebs cycle, electron transport and oxidative phosphorylation lead to this accumulation. 4. Briefly discuss the following, stressing their biochemical significance.
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