Give one three-carbon intermediate produced at the end of the energy- investment phase of glycolysis.
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Q: List four anabolic pathways that utilize citric acid cycle intermediates as starting material.
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Q: reactions in the glycolytic
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Q: Give one three-carbon intermediate produced at the end of the energy-investment phase of glycolysis.
A: Two molecules of Pyruvate are produced in the end of the energy investment phase of glycolysis.
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Q: Outline the steps of the glyoxylate cycle.
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Q: Consider the fate of pyruvate labeled with 14C in each of the following positions: carbon 1…
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Q: Under anaerobic or hypoxic conditions, some organisms can transfer electrons from NADH to pyruvate…
A: The pyruvate formed as the product in the glycolysis has two fates. In the absence of oxygen, it…
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- The Reactions and Meehanisms of the Leloir Pathway Write the reactions that permit galactose to be utilized in glycolysis. Write a suitable mechanism, tor one of these reactions.hexokinase catalyzes the first reaction of the glycolysis pathway. What may happen if there is xylose in the reaction place? Briefly explain.What is the effect of an increase in the levels of glyceraldehyde-3-phosphate (G3P) on glycolysis. Make reference to at least one relevant product/byproduct of glycolysis.
- The tricarboxylate transport system supplies cytosolic acetyl-CoA for palmitate synthesis. What percentage of the NADPH required for palmitate synthesis is thereby provided?How many ATP equivalents would be generated or used by the metabolism of 2 oxaloacetate to glucose?Xylulose-5-phosphate is an intermediate in the pentose phosphate pathway (see Figure). As xylulose-5-phosphate levels rise in response to excess glucose shunting through the pentose phosphate pathway, does flux through glycolysis increase or decrease?
- Starting with pyruvate (CH3COCOO—) as the precursor, the first step of gluconeogenesis is activation of pyruvate. Show the reaction for activation of pyruvate. Name the enzyme and coenzyme for this reaction. Why is the activation step necessary? What is the next step after the activation step?What if the phosphate group for the glycolysis reaction with enzyme glyceraldehyde 3-phosphate dehydrogenase was from ATP instead of Pi? What would the complete, balanced, net rxn of glycoslysisequation be and how does this impact the overall glycolysis rxn?The pyruvate →lactate reaction in animals is reversible, but the pyruvate → ethanol fermentation in yeast is irreversible. Explain.
- Explain why pyruvate cannot be converted to glucose in an exact reverse of the glycolysis pathway.What are the two most important carriers in one-carbonmetabolism? Give two examples of processes in which eachone participates.In the following diagram of glycolysis. Identify the steps that are amphibolic, taking place in both glycolysis and gluconeogenesis. Also, identify the regulated steps and what compounds act as regulators.
