. 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?

. 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?

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter16: Spontaneity Of Reaction

Section: Chapter Questions

Problem 75QAP: When glucose, C6H12O11, is metabolized to CO2 and H2O in living systems, the first step is the...

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When glucose, C6H12O11, is metabolized to CO2 and H2O in living systems, the first step is the conversion of glucose to glucose-6-phosphate. glucose+H3PO4glucose-6-phosphate+H2OG=13.4kJ This nonspontaneous reaction can be made to proceed by coupling it with the hydrolysis of ATP. ATP+H2OADP+H3PO4G=31.0kJ (a) Write an equation for the coupled reaction and calculate G°. (b) Estimate the number of moles of ATP required to convert glucose to glucose-6-phosphate.
In glycolysis, the reaction of glucose (Glu) to form glucose-6-phosphate (G6P) requires ATP to be present as described by the following equation: Glu+ATPG6P+ADPG298=17kJ In this process, ATP becomes ADP summarized by the following equation: ATPADPG298=30kJ Determine the standard free energy change for the following reaction, and explain why ATP is necessary to drive this process: GluG6PG298=?
The 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?
The reaction for “activation” of a fatty acid (RCOO−), ATP + CoA + RCOO−⇌ RCOOCoA + AMP + PPi has ΔG°′ = +4.6 kJ · mol−1. What is the thermo dynamic driving force for this reaction?
As you exhale each breath, you expel about 0.5 L against a pressure of 1 atm. (a) If you breathe about 30 times per minute, how much work do you do in this way each day? (Neglect any work involved in inhaling.) (b) Using the AG value for ATP hydrolysis, what is the minimum number of moles of ATP you will utilize per day just in breathing?
In the following reactions, identify the substance oxidized, the substance reduced, the oxidizing agent, & the reducing agent. ronmenta Malate Oxaloacetate Руruvate Lactate COO- COO- || C-o- C-0- Но -С—Н C=0 (a) | ċ=0 (b) Но-С—Н CH2 CH, ČOO- ČOO- Pyruvate + NADH + H' → Lactate + NAD* Malate + NAD* –Oxaloacetate + NADH + H* (1) (2)
1. How many nutritional calories will be obtained from ATP derived from 3.00 grams tristearin? [This is like la in H12a, but now you must find ATP from three stearic acids AND glycerol. Then use ATP to find nutritional calorie It's not hard.] A Canadia
Consider the coupled reactions: kcal AGO'= -16.3 mol 1,3-ВPG 3-PG + Pi AG°'= -7.3 kcal mol ATP → ADP + P; What is the net reaction? 3-PG + ADP + Pi→ 1,3-BPG + ATP 3-PG + ATP → 1,3-BPG + ADP + P¡ O 1,3-BPG + ADP + P¡ –→ 3-PG + ATP O 1,3-BPG + ATP → 3-PG + ADP + P¡
Consider the following interconversion, which occurs in glycolysis : glucose 6-phosphate = 1.97 K'ea Fructose 6-phosphate (a) What is AG°' for the reaction (K'eq measured at 25 °C)? (b) If the concentration of fructose 6-phosphate is adjusted to 1.5 M and that of glucose 6-phosphate is adjusted to 0.50 M, what is AG? (c) Why are AG and AGO' different?
How much converted free energy would be needed to obtain 7.8 mM of ATP at 37 ° C, if both ADP and inorganic phosphate (Pi) are at 0.3 mM?
Classify the following compounds as endergonic or exergonic : (a) glucose,(b) methylamine, (c) octane, (d) ethanol.
Give an account of the total ATP yield when I molecule of glucose is converted to carbon dioxide and water?