11 XFor the hydrolysis ofglucose-6-phosphate,glucose-6-P + H₂O =glucose + PiAG'°= -13.8 kJ/mol andK'eq = 3.81x10-³ at 25°C.Therefore the [glucose-6-phosphate]/[glucose] ratiois about 1/260 atequilibrium.What is the [glucose-6-phosphate]/[glucose] ratioat equilibrium when thisreaction is coupled to ATPhydrolysis in the coupledreactionglucose + ATP =glucose-6-phosphate +ADPand [ATP] = ADP]? For ATPhydrolysis AG'°= -30.5 kJ/mol at 25°C.0/1 Point Earned9/10 Attempts Remaining

In this coupled reaction, the hydrolysis of glucose-6-phosphate is coupled with the hydrolysis of…

Answered: × For the hydrolysis of…

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter24: Lipid Biosynthesis

Section: Chapter Questions

Problem 23P

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Do you think that the Ea for ATP hydrolysis is relatively low or high? Explain your reasoning.
The energy released by the hydrolysis of ATP is primarily stored between the alpha and beta phosphates equal to -57 kcal/mol harnessed as heat energy by the cell to perform work providing energy to coupled reactions
Energetic of Fructose-1 ,6-bis P Hydrolysis (Integrates with Chapter 3.) The standard free energy change (G) for hydrolysis of fructose-1. 6-bisphosphate (FBP) to fructose-S-phosphate (F-6-P) and P: is -16.7 KJ/mol: FBP + H2O fructose-6-P + Pi The standard free energy change (G) for ATP hydrolysis is -30.5 KJ/mol: ATP + H2O ADP + Pj What is the standard free energy change for the phosphofructokinase reaction: ATP + fructose-6-P ADP + FBP b. What is the equilibrium constant for this reaction? c. Assuming the intracellular concentrations of [ATP] and (ADP] are maintained constant at 4 mM and 1.6 mM, respectively, in a rat liver cell, what will be the ratio of [FBP]/[fructose-6-P] when the phosphofructokinase reaction reaches equilibrium?
In type II diabetes, insulin is produced but is nonfunctional. These patients are described as starving in a sea of plenty, because their blood glucose levels are high, but none of die glucose is transported into the cells. Describe how this leads to malnutrition.
Ketone bodies are used as an alternative source of fuel during starvation. Describe how ketones are synthesized.
The pH of lemon juice is 2, and the pH of orange juice is 4. Which of these is more acidic, and by how much? What does this mean?
Using the Nernst equation, calculate the equilibrium potential for Ca2 and for C1 from the following sets of data: a. Given [ Ca2+ ]0=1mM,[ Ca2+ ]i=100nM, find Eca2+ b. Given [ Cl- ]0=110mM,[ Cl- ]i=100mM, find Ecl
Plasma contains more sodium than chloride. How can this be if individual ions of sodium and chloride exactly balance each other out, and plasma is electrically neutral?
Amino acids are not stored in the body. Describe how excess amino acids are processed in the cell.
Using the ActiveModel for phosphofructokinase (Trypanosoma), describe the difference between the APO1, AP02, and holoenzyme conformations.
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Distinguishing the Mechanisms of Class I and Class I Aldolases Fructose bisphosphate aldolase in animal muscle is a class 1 aldolase, which forms a Schiff base intermediate between substrate (for example. fructose-1, 6-bisphosphate or dihydroxyacetone phosphate) and a lysine at the active site (see Figure I8.12). The chemical evidence for this intermediate conies from studies with aldolase and the reducing agent sodium borohydride, NaBH4. Incubation of the enzyme with dihydroxyacetone phosphate and NaBH4 inactivates the enzyme. Interestingly, no inactivation is observed if NabH4 is added to the enzyme in the absence of substrate. Write a mechanism that explains these observations and provides evidence for the formation of a Schiff base intermediate in the aldolase reaction.

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