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I What are the steps in the energy investment phase?

I What are the steps in the energy investment phase?

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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ACTIVITY 10.4.2 Explain your answer briefly but concisely. What are the steps in the energy investment phase? 2. What are the steps in the energy-yielding phase? 3. What are the enzymes involved in an irreversible reaction? How are these enzymes being activated? What about inhibited? 4. Which step in the glycolytic pathway would ensure that glucose is fated for glycolysis? 5. During strenuous activity, the demand for ATP in muscle tissue is vastly increased. In rabbit leg muscle or turkey flight muscle, the ATP is produced almost exclusively by lactic acid fermentation. ATP is formed in the payoff phase of glycolysis by two reactions, promoted by phosphoglycerate kinase and pyruvate kinase. Suppose skeletal muscle were devoid of lactate dehydrogenase. Could it carry out the strenuous physical activity; that is, could it generate ATP at a high rate by glycolysis? Explain. 6. The transformation of glucose to lactate n myocytes releases only about 7% of the free energy released when glucose is completely oxidized to CO2 and Hz0O. Does this mean that anaerobic glycolysis in muscle is a wasteful use of glucose? Explain.
Transcribed Image Text:ACTIVITY 10.4.2 Explain your answer briefly but concisely. What are the steps in the energy investment phase? 2. What are the steps in the energy-yielding phase? 3. What are the enzymes involved in an irreversible reaction? How are these enzymes being activated? What about inhibited? 4. Which step in the glycolytic pathway would ensure that glucose is fated for glycolysis? 5. During strenuous activity, the demand for ATP in muscle tissue is vastly increased. In rabbit leg muscle or turkey flight muscle, the ATP is produced almost exclusively by lactic acid fermentation. ATP is formed in the payoff phase of glycolysis by two reactions, promoted by phosphoglycerate kinase and pyruvate kinase. Suppose skeletal muscle were devoid of lactate dehydrogenase. Could it carry out the strenuous physical activity; that is, could it generate ATP at a high rate by glycolysis? Explain. 6. The transformation of glucose to lactate n myocytes releases only about 7% of the free energy released when glucose is completely oxidized to CO2 and Hz0O. Does this mean that anaerobic glycolysis in muscle is a wasteful use of glucose? Explain.
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