Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Chapter 29.SE, Problem 44AP
Interpretation Introduction
Interpretation:
Glycolysis a catabolic process of breakdown of sugar and gluconeogenesis-an Anabolic process involving biosynthesis of sugar are never, the exact inverse of each other.
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What are coupled reactions and why does coupling occur?
Trypanosomes living in the bloodstream obtain all their free energy from glycolysis. They take up glucose from the host’s blood and excrete pyruvate as a waste product. In this part of their life cycle, trypanosomes do not carry out any oxidative phosphorylation, but they do use another oxygen-dependent pathway, which is absent in mammals, to oxidize NADH. Would this pathway be necessary if the trypanosome excreted lactate rather than pyruvate? Explain.
Oxaloacetate + ADP + Pi + H+ ---> Pyruvate + ATP + HCO3- ΔGo’ = 13.91 kJ/mol
Lactate + NAD+ ---> Pyruvate + NADH + H+ ΔGo’ = 25.12 kJ/mol
Oxaloacetate + GTP ---> Phosphoenolpyruvate + GDP + CO2 ΔGo’ = -28.40 kJ/mol
HCO3- + H+ ---> CO2 + H2O ΔGo’ = -41.45 kJ/mol
GDP + ATP ---> GTP + ADP ΔGo’ = -0.003 kJ/mol
_________________________________________________________________________________________________________________
Lactate + NAD+ + 2ATP + H2O ---> Phosphoenolpyruvate + NADH + 2ADP + Pi + 3H+
From the above information, calculate theΔGo’ for the overall reaction shown…
Chapter 29 Solutions
Organic Chemistry
Ch. 29.1 - Prob. 1PCh. 29.3 - Write the equations for the remaining passages of...Ch. 29.3 - Prob. 3PCh. 29.4 - Write a mechanism for the dehydration reaction of...Ch. 29.4 - Evidence for the role of acetate in fatty-acid...Ch. 29.4 - Does the reduction of acetoacetyl ACP in step 6...Ch. 29.5 - Prob. 7PCh. 29.5 - Look at the entire glycolysis pathway, and make a...Ch. 29.6 - Prob. 9PCh. 29.7 - Prob. 10P
Ch. 29.7 - Write mechanisms for step 2 of the citric acid...Ch. 29.7 - Prob. 12PCh. 29.8 - Prob. 13PCh. 29.9 - Write all the steps in the transamination reaction...Ch. 29.9 - What -keto acid is formed on transamination of...Ch. 29.9 - Prob. 16PCh. 29.SE - Prob. 17VCCh. 29.SE - Identify the following intermediate in the citric...Ch. 29.SE - The following compound is an intermediate in the...Ch. 29.SE - Prob. 20VCCh. 29.SE - In the pentose phosphate pathway for degrading...Ch. 29.SE - Prob. 22MPCh. 29.SE - One of the steps in the pentose phosphate pathway...Ch. 29.SE - One of the steps in the pentose phosphate pathway...Ch. 29.SE - Prob. 25MPCh. 29.SE - Prob. 26MPCh. 29.SE - Prob. 27MPCh. 29.SE - Prob. 28MPCh. 29.SE - Prob. 29MPCh. 29.SE - Prob. 30MPCh. 29.SE - Prob. 31MPCh. 29.SE - Prob. 32APCh. 29.SE - Prob. 33APCh. 29.SE - Prob. 34APCh. 29.SE - Prob. 35APCh. 29.SE - Prob. 36APCh. 29.SE - Prob. 37APCh. 29.SE - Prob. 38APCh. 29.SE - Prob. 39APCh. 29.SE - Prob. 40APCh. 29.SE - Prob. 41APCh. 29.SE - Prob. 42APCh. 29.SE - Prob. 43APCh. 29.SE - Prob. 44APCh. 29.SE - Prob. 45APCh. 29.SE - Prob. 46APCh. 29.SE - Prob. 47APCh. 29.SE - Prob. 48APCh. 29.SE - Prob. 49APCh. 29.SE - Prob. 50APCh. 29.SE - In glycerol metabolism, the oxidation of...Ch. 29.SE - Prob. 52APCh. 29.SE - Prob. 53APCh. 29.SE - Prob. 54APCh. 29.SE - In step 7 of fatty-acid biosynthesis (Figure...Ch. 29.SE - Prob. 56AP
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- Oxaloacetate + ADP + Pi + H+ ---> Pyruvate + ATP + HCO3- ΔGo’ = 13.91 kJ/mol Lactate + NAD+ ---> Pyruvate + NADH + H+ ΔGo’ = 25.12 kJ/mol Oxaloacetate + GTP ---> Phosphoenolpyruvate + GDP + CO2 ΔGo’ = -28.40 kJ/mol HCO3- + H+ ---> CO2 + H2O ΔGo’ = -41.45 kJ/mol GDP + ATP ---> GTP + ADP ΔGo’ = -0.003 kJ/mol _________________________________________________________________________________________________________________ Lactate + NAD+ + 2ATP + H2O ---> Phosphoenolpyruvate + NADH + 2ADP + Pi + 3H+ From the above information, calculate the Keq’ for the overall reaction shown…arrow_forwardNeed help with 5arrow_forwardIn the pathways of cell metabolism, 1) glycolysis does NOT occur in the mitochondria, AND 2) the proton gradient in oxidative phosphorylation occurs through an ACTIVE transport process. True Falsearrow_forward
- The irreversible kinase reactions in glycolysis are catalyzed by: 1) hexokinase (glucokinase)2) phosphoglycerate kinase3) phosphofructokinase4) phosphoenolpyruvate carboxykinase 5) pyruvate kinasearrow_forwardThe image below shows the reactions of the citric acid cycle. Label the reaction types on the diagram. COO CH-OH CH₂ COO 8-5-9-8 HC H₂O NADH +H+ NAD+- FADH2 "7 FAD COO C=O CH₂ COO™ COO CH3-C-COA + H₂O acetyl-CoA COA COO™ Ī CH₂ HỌ—C—COO CH₂ COO™ COO HO-C-H COO™ COO™ CH₂ CH-COO NAD+ NAD+ + COA Attempt 2 NADH + H+ + CO2 NADH + H+ + CO2 COO™ CH₂ CH₂ C=O COO™arrow_forwardCan you help to solve this?arrow_forward
- In the citric acid cycle, a - ketoglutarate dehydrogenase catalyzes the reaction from a - ketoglutarate to Succinyl CoA. Given this reaction, calculate for the enthalpy of formation of the product using (a) Hess's Law, (b) standard enthalpies of formation and (c) mean bond enthalpies. Show your complete solution. COA-S OOC CH2 CH2 + NAD++ COA + CO2 + NADH CH2 a-ketoglutarate CH2 dehydrogenase COO a-ketoglutarate COO Succinyl CoAarrow_forwardThe rate-limiting step is a metabolic pathway is the slowest step which determines the overall rate of the other reactions in the pathway. In glycolysis, the rate limiting step is a phosphorylation reaction where phosphofructokinase (PFK-1) catalyzes the reaction fructose-6-bisphosphate -> fructose-1,6-bisphosphate, the same step in gluconeogenesis. Select one: The statement is FALSE. The statement is TRUE.arrow_forwardThe enzyme that catalyzes reaction below can be classified as: NAD* NADH + H* Но- H-Ć- Н—с—н H- malate dehydrogenase Oxaloacetate Malatearrow_forward
- What class of enzymes to these two belong to?arrow_forwardOne of the major goals of metabolism is using energy for catabolism of complex molecules. * O True O Falsearrow_forwardGluconeogenesis is the production of glucose from non-carbohydrate molecules. Which of the following is not substrate for gluconeogenesis? Oa) Lactate Ob) Alanine c) Glycerol O d) Acetyl CoAarrow_forward
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