Introduction to General, Organic and Biochemistry
11th Edition
ISBN: 9781285869759
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Question
Chapter 28, Problem 28.59P
Interpretation Introduction
Interpretation:
Phosphoenolpyruvate (PEP) has a high-energy phosphate bond that has more energy than the anhydride bonds in ATP. Determine the step of the glycolysis, which suggests the same.
Concept Introduction:
PEP is a very essential intermediate in glycolysis as well as gluconeogenesis. It is important for the formation of the ATP from the ADP as it has a phosphate bond with highest energy, which is easily transferred to the ADP.
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The average adult consumes approximately 11,700 kJ per day. Assuming that the metabolic pathways leading to ATP synthesis operate at 50% thermodynamic efficiency, about 5850 kJ ends up in the form of synthesized ATP.
Imagine that creatine phosphate, rather than ATP, is the universal energy carrier molecule in the human body. Assume that the cellular concentrations of creatine phosphate, creatine, and phosphate are 21.7 mM, 2.17×10-3 mM, and 6.30 mM, respectively. Calculate the weight of creatine phosphate that would need to be consumed each day by a typical adult human if creatine phosphate could not be recycled. Estimate the free energy of hyrdolysis of creatine phosphate under cellular conditions to determine how many moles are required. Use the standard…
Chapter 28 Solutions
Introduction to General, Organic and Biochemistry
Ch. 28.7 - Prob. 28.1PCh. 28 - What are the products of lipase-catalyzed...Ch. 28 - What is the main use of amino acids in the body?Ch. 28 - Prob. 28.4PCh. 28 - Prob. 28.5PCh. 28 - Prob. 28.6PCh. 28 - Prob. 28.7PCh. 28 - Prob. 28.8PCh. 28 - Prob. 28.9PCh. 28 - Prob. 28.10P
Ch. 28 - Prob. 28.11PCh. 28 - Prob. 28.12PCh. 28 - Prob. 28.13PCh. 28 - Prob. 28.14PCh. 28 - Prob. 28.15PCh. 28 - Prob. 28.16PCh. 28 - Prob. 28.17PCh. 28 - Prob. 28.18PCh. 28 - Prob. 28.19PCh. 28 - Prob. 28.20PCh. 28 - Two enzymes participating in ß-oxidation have the...Ch. 28 - Prob. 28.22PCh. 28 - Prob. 28.23PCh. 28 - Is the ß -oxidation of fatty acid (without the...Ch. 28 - Calculate the number of ATP molecules obtained in...Ch. 28 - Prob. 28.26PCh. 28 - Prob. 28.27PCh. 28 - Prob. 28.28PCh. 28 - Prob. 28.29PCh. 28 - Prob. 28.30PCh. 28 - Prob. 28.31PCh. 28 - Prob. 28.32PCh. 28 - Prob. 28.33PCh. 28 - Ammonia, NH3, and ammonium ion, NH+4are both...Ch. 28 - Prob. 28.35PCh. 28 - Prob. 28.36PCh. 28 - Prob. 28.37PCh. 28 - Prob. 28.38PCh. 28 - 28-39 The metabolism of the carbon skeleton of...Ch. 28 - Prob. 28.40PCh. 28 - Prob. 28.41PCh. 28 - Prob. 28.42PCh. 28 - Prob. 28.43PCh. 28 - Prob. 28.44PCh. 28 - Prob. 28.45PCh. 28 - Prob. 28.46PCh. 28 - Prob. 28.47PCh. 28 - Prob. 28.48PCh. 28 - Prob. 28.49PCh. 28 - Prob. 28.50PCh. 28 - Prob. 28.51PCh. 28 - Prob. 28.52PCh. 28 - Prob. 28.53PCh. 28 - Prob. 28.54PCh. 28 - Prob. 28.55PCh. 28 - Prob. 28.56PCh. 28 - Prob. 28.57PCh. 28 - Write the products of the transamination reaction...Ch. 28 - Prob. 28.59PCh. 28 - Prob. 28.60PCh. 28 - Prob. 28.61PCh. 28 - Prob. 28.62PCh. 28 - Prob. 28.63PCh. 28 - Prob. 28.64PCh. 28 - Prob. 28.65PCh. 28 - Prob. 28.66PCh. 28 - Prob. 28.67PCh. 28 - Prob. 28.68PCh. 28 - Prob. 28.69PCh. 28 - Prob. 28.70PCh. 28 - Prob. 28.71PCh. 28 - Prob. 28.72PCh. 28 - Prob. 28.73PCh. 28 - Prob. 28.74PCh. 28 - Prob. 28.75PCh. 28 - Prob. 28.76PCh. 28 - Prob. 28.77PCh. 28 - Prob. 28.78PCh. 28 - Prob. 28.79PCh. 28 - Many soft drinks contain citric acid to add...Ch. 28 - Prob. 28.81PCh. 28 - One occasionally hears diet advice that proteins...Ch. 28 - Prob. 28.83PCh. 28 - Prob. 28.84P
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- The first step of the metabolic process known as glycolysis is the conversion of glucose to glucose- 6-phosphate. This process has a positive value for rG' Glucose + Pi Glucose-6-phosphate + H2O rG' = +13.8 kJ/mol-rxn This reaction is coupled to the hydrolysis of ATP ATP + H2O ADP + Pi rG' = -30.5 kJ/mol-rxn What is the sum of these two equations and the value of rG' for the coupled reaction? Is the coupled reaction product-favored at equilibrium?arrow_forwardUsing symbolic formulas such as ADP and PPi, write equations for the hydrolysis of ATP to ADP and the hydrolysis of ATP to AMP.arrow_forwardThe oxidation of 1 mol of glucose supplies enough meta-bolic energy to form 36 mol of ATP. Oxidation of 1 mol of a typ-ical dietary fat like tristearin (C₅₇H₁₁₆O₆) yields enough energyto form 458 mol of ATP. (a) How many molecules of ATP canform per gram of glucose? (b) Per gram of tristearin?arrow_forward
- Write a balanced chemical reaction for the catalyzed by citrate synthase in the acetic acid cycle and determine the type of the reaction.arrow_forwardWhat are the three kinds of enzymes-controlled reaction so that the chemical bond energy from a certain nutrietiens is released to the cell in a form of ATP?arrow_forwardAll are true of the Embden-Myerhof pathway EXCEPT Question 88 options: A) the products pyruvic acid and ATP under aerobic conditions enter the Krebb's (TCA) cycle to produce more ATP B) the products pyruvic acid and ATP under anaerobic conditions are converted to lactic acid and two additional ATP C) Cells use this pathway when they have no energy needs D) Begins with the conversion of glucose into glucose-6-phosphatearrow_forward
- . Each gram of mammalian skeletal muscle consumes ATP at a rate of about 1x 10-3 mol/min during contraction. Concentrations of ATP and creatine phosphate in muscle are about 4 mM and 25 mM, respectively, and the density of muscle tissue can be taken to be about 1.2 g/cm'. (a) How long could contraction continue using ATP alone? (b) If all creatine phosphate were converted into ATP and utilized as well, how long could contraction continue? (c) What do these answers tell you?arrow_forward2. Why do enzymes become inactive at very low temperature? Why do enzymes become inactive at very high temperatures? (Hint: It is NOT the same reason.)arrow_forwardTrypanosomes 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.arrow_forward
- Calculate ΔG°′ for the oxidation of free FADH2 by O2. What is the maximum number of ATPs that can be synthesized, assuming standard conditions and 100% conservation of energy?arrow_forwardrank in order that releases most to least amount of energyarrow_forwardAnaerobic glycolysis (i.e., lactic acid fermentation) produces pyruvate that is then converted to lactate through the activity of lactate dehydrogenase. The conversion of pyruvate to lactate would seem to be an unnecessary step, since this process does not result in any further release of energy. Explain the necessity for the production of lactate as the endpoint for anaerobic glycolysis.arrow_forward
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