Biochemistry: Concepts and Connections (2nd Edition)
2nd Edition
ISBN: 9780134641621
Author: Dean R. Appling, Spencer J. Anthony-Cahill, Christopher K. Mathews
Publisher: PEARSON
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Chapter 3, Problem 14P
Undergoing moderate activity, an average person will generate about 350 kJ of heat per hour. Using the heat of combustion of palmitic acid (
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Undergoing moderate activity, an average person will generate about
350 kJ of heat per hour. Using the heat of combustion of palmitic acid
(AH = -9977.6 kJ/mol) as an approximate value for fatty substances, esti-
mate how many grams of fat would be required per day to sustain this level,
if all were burned for heat.
The primary source of phosphate for chemical reactions in cells comes as ATP, ADP, or AMP. The ΔG˚’ for the hydrolysis of ATP into ADP and Pi is -30.5 kJ/mol. Calculate the equilibrium constant for the hydrolysis of ATP.
sixteen milligram of gluecose were eaten by the bacteria Sanacoccus pumasarious. calculate the hypothetical amount of Atp your patient can generate under aerobic respiration with this amount of glucose glucose MW=180.16g/mol ;1mol=6.02x10^23
Chapter 3 Solutions
Biochemistry: Concepts and Connections (2nd Edition)
Ch. 3 - Prob. 1PCh. 3 - Given the following reactions and their...Ch. 3 - The decomposition of crystalline N2O5...Ch. 3 - The oxidation of glucose to CO2 and water is a...Ch. 3 - Prob. 5PCh. 3 - In another key reaction in glycolysis,...Ch. 3 - Assume that some protein molecule, in its folded...Ch. 3 - When a hydrophobic substance like a hydrocarbon is...Ch. 3 - It is observed that as temperature is increased,...Ch. 3 - Suppose a reaction has Ho and So values...
Ch. 3 - Prob. 11PCh. 3 - Prob. 12PCh. 3 - Prob. 13PCh. 3 - Undergoing moderate activity, an average person...Ch. 3 - The major difference between a protein molecule in...Ch. 3 - Prob. 16PCh. 3 - Prob. 17PCh. 3 - Consider the degradation of glucose to pyruvate by...Ch. 3 - a. Consider the malate dehydrogenase reaction,...Ch. 3 - Bovine ribonuclease folds with Ho = -280 kJmol-1...
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- Write down the energy content in kilo-calories (kcal) from one gram of fat, one gram of carbohydrate and one gram of protein obtained by complete combustion in calorimeter (assume by yourself and show the calculation steps) and by completely broken down in human body in the following table. Please give references. Complete combustion in calorimeter * Completely broken down in body 1 g of Fat 1 g of Protein 1 g of Carbohydrate 1 g of Mixed Foodarrow_forwardWalking consumes approximately 100 kcal/mi. In the hydrolysis of ATP (ATP → ADP + Pi), the reaction that drives muscle contraction, ΔG°′ is −7.3 kcal/mol (−30.5 kJ/mol). Calculate how many grams of ATP must be produced to walk a mile. ATP synthesis is coupled to the oxidation of glucose (ΔG°′ = −686 kcal/mol). How many grams of glucose are actually metabolized to produce this amount of ATP? (Assume that only glucose oxidation is used to generate ATP and that 40% of the energy generated from this process is used to phosphorylate ADP. The gram molecular weight of glucose is 180 g and that of ATP is 507 g.)arrow_forwardTriacylglycerols, with their hydrocarbon-like fatty acids, have the highest energy content of the major nutrients. (a) If 15% of the body mass of a 70.0 kg adult consists of triacylglycerols, what is the total available fuel reserve, in kilojoules and kilocalories, in the form of triacylglycerols? Recall that 1.00 kcal = 4.18 kJ. (b) If the basal energy requirement is approximately 8,400 kJ/day (2,000 kcal/day), how long could this person survive if the oxidation of fatty acids stored as triacylglycerols were the only source of energy? (c) What would be the weight loss in pounds per day under such starvation conditions (1 lb = 0.454 kg)?arrow_forward
- 1) An average middle-aged person weighing 90 kg (200 lb.) contains 15 % body fat stored in adipose tissue. a) Calculate the amount of energy stored as fat in this person in kilojoules, assuming that energy yield from fat is 37 kJ/g. b) If this same amount of energy were stored in hydrated glycogen rather than fat (hydrated glycogen has an energy yield of 6 kJ/g), how much would the person weight in kilograms and in pounds?arrow_forwardIf palmitic acid is subjected to complete combustion in a bomb calorimeter, one can calculate a standard free energy of combustion of 9788 kJ/mol. From the ATP yield of palmitate oxidation, what is the metabolic efficiency of the biological oxidation, in terms of kilojoules saved as ATP per kilojoule released? (Ignore the cost of fatty acid activation.)arrow_forwardGlucose is a carbohydrate central to energy metabolism. Glucose provides most of the energy to the brain and its levels are closely controlled in healthy individuals. Improper control of glucose levels is found in diabetes.Assume that the maximum number of ATPs is produced (38). At pH 7, and in the presence of excess Mg2+, how much of the energy in one mole of glucose is stored as ATP? kJ Assuming the maximum number of ATPs are produced at pH 7 and in the presence of Mg2+, 1159 kJ of energy are stored as ATP. What is the percent efficiency?arrow_forward
- Calculate the free energy change for glucose entry into cells when the extracellular concentration is 4.5 mM and the intracellular concentration is 2.1 mM at 37oC. Express your answer in kJ/mol.arrow_forwardDuring glycolysis, glucose is converted into fructose-6- phosphate in two successive reactions: glucose + ATP glucose 6-phosphate + ADP glucose 6-phosphate fructose 6-phosphate The AG' for the overall reaction is: +15.0 kJ/mol. -18.4 kJ/mol. -16.7 kJ/mol. → -15.0 kJ/mol. +18.4 kJ/mol. AG¹⁰ = -16.7 kJ/mol AG¹⁰ = +1.7 kJ/molarrow_forwardInside cells, the AG value for the hydrolysis of ATP to ADP + Pi is approximately -50 kJ/mol (-12 kcal/mol). Calculate the approximate ratio of [ATP] to [ADP][Pi ] in cells at 37°C. AG = AG + RT InKe R= 8.315 x 10³ kJ mol deg T= 298 K Table 15.1 Standard free energies of hydrolysis of some phosphorylated compounds Compound kJ mol- kcal mol- Phosphoenolpyruvate 1,3-Bisphosphoglycerate Creatine phosphate ATP (to ADP) -61.9 -14.8 -49.4 -11.8 -43.1 -10.3 -30.5 - 7.3 - 5.0 Glucose 1-phosphate Pyrophosphate Glucose 6-phosphate -20.9 -19.3 -4.6 -13.8 3.3 Glycerol 3-phosphate - 9.2 2.2 biochemistryarrow_forward
- Calculate all the glucose data into cmol. What is the number of cmol glucose at timepont 10.42 (19.65 g/L)?arrow_forwardCalculate the TEF (in kcal/day) of a 2,678 kilocalorie daily diet. (show work)arrow_forwardGastric juice (pH 1.5) is produced by pumping HCl from blood plasma (pH 7.4) into the stomach. Calculate the amount of free energy required to concentrate the H+ in 1 L of gastric juice at 37 °C. Under cellular conditions,how many moles of ATP must be hydrolyzed to provide this amount of free energy? The free-energy change for ATP hydrolysis under cellular conditions is about −58 kJ/mol . Ignore the effects of the transmembrane electrical potential.arrow_forward
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