WORLD OF CELL+MASTERING ACCESS >CUSTOM
9th Edition
ISBN: 9781323445044
Author: Hardin
Publisher: PEARSON C
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Textbook Question
Chapter 9, Problem 9.7CC
Why don’t glycolysis (glucose to pyruvate) and gluconeogenesis (pyruvate to glucose) simply use the same enzymatic steps in reverse order?
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Why are some enzymes needed only in the gluconeogenesis pathway and not in the glycolysis pathway?
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Of the 36 molecules of ATP produced by the complete metabolism of glucose, how many are produced directly in glycolysis alone, that is, before the common pathway?
Chapter 9 Solutions
WORLD OF CELL+MASTERING ACCESS >CUSTOM
Ch. 9 - How are catabolic and anabolic pathways similar?...Ch. 9 - Prob. 9.2CCCh. 9 - Why do oxidation and reduction reactions always...Ch. 9 - How can glucose be oxidized in the absence of...Ch. 9 - In the absence of oxygen, why is it necessary to...Ch. 9 - Prob. 9.6CCCh. 9 - Prob. 1QCh. 9 - Why dont glycolysis (glucose to pyruvate) and...Ch. 9 - Why are the key regulatory enzymes in glycolysis...Ch. 9 - Why do cancer cells carry out high rates of...
Ch. 9 - High-Energy Bonds. When first introduced by Fritz...Ch. 9 - The History of Glycolysis. Following are several...Ch. 9 - Glycolysis in 25 Words or Fewer. Complete each of...Ch. 9 - Energetics of Carbohydrate Utilization. The...Ch. 9 - QUANTITATIVE Glucose Phosphorylation. The direct...Ch. 9 - Ethanol Intoxication and Methanol Toxicity. The...Ch. 9 - Propionate Fermentation. Although lactate and...Ch. 9 - QUANTITATIVE Glycolysis and Gluconeogenesis. As...Ch. 9 - Prob. 9.9PSCh. 9 - Youve Got Some Explaining to Do. Explain each of...Ch. 9 - Arsenate Poisoning. Arsenate (HAsO42) is a potent...Ch. 9 - Life Without Phosphofructokinase. Many bacteria do...Ch. 9 - Prob. 9.13PS
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- Both prokaryotic and eukaryotic organisms carry out some form of glycolysis. How does ha fact support or not support the assertion that glycolysis is one of the oldest metabolic pathways?arrow_forwardWhy is the formation of fructose-1,6-bisphosphate the committed step in glycolysis?arrow_forwardWhich of the following describes the process of converting a pyruvate back to glucose? glycogenolysis glycolysis glycogenesis gluconeogenesisarrow_forward
- Where in a liver cell do the following pathways occur? (a) Glycolysis (b) Gluconeogenesis (c) Glycogenesis (d) Glycogenolysisarrow_forwardAlthough the catabolism of glucose produces energy, the first step uses energy. Explain why.arrow_forwardFructose can enter glycolysis by hexokinase. If fructose is used for glycolysis what enzyme can be skipped in glycolysis? And why can this enzyme be skipped if fructose is used for glycolysis?arrow_forward
- Why is glycolysis more rapid after the infusion of fructose?arrow_forwardWhat is the key regulatory enzyme in glycolysis? Please explain how this enzyme is regulated just after a meal has been consumed.arrow_forwardHow many steps in gluconeogenesis are not the exact reversal of the steps in glycolysis? What kind of conversion of substrate to product does each involve? What is the common theme in each of these reactions?arrow_forward
- In which step of glycolysis does each of the following occurs? second substrate-level phosphorylation reaction first ATP-consuming reaction third isomerization reaction use of NAD+ as an OAarrow_forwardsome times, the enzymes in TCA cycle are found in gly colysis to generate energy. Why is this posible even though they are not the samearrow_forwardThe hydrolysis of some disaccharides produces glucose molecules that directly enter glycolysis. What happens to other monosaccharides?arrow_forward
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