1. Why there is a larger ΔG’°for a reaction featuring an adenyl transfer than for the...
1. Why there is a larger ΔG’°for a reaction featuring an adenyl transfer than for the hydrolysis of ATP to ADP.
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1. Why there is a larger ΔG’°for a reaction featuring
an adenyl transfer than for the...
A: The phosphorylation of glucose using inorganic phosphate (abbreviated PiPi) is endergonic (ΔG∘′=+3.3kcal/molΔG∘′=+3.3kcal/mol), whereas the dephosphorylation...
A: The phosphorylation of glucose using inorganic phosphate (abbreviated PiPi) is endergonic (ΔG∘′=+3.3kcal/molΔG∘′=+3.3kcal/mol), whereas the dephosphorylation (hydrolysis) of ATPATP is exergonic (ΔG∘′=−7.3kcal/molΔG∘′=−7.3kcal/mol): glucose+Pi⇌glucoseglucose+Pi⇌glucose-66-phosphate+H2Ophosphate+H2O ATP+H2O→ADP+PiATP+H2O→ADP+Pi Choose a reaction for the phosphorylation of glucose by the transfer of a phosphate group from ATPATP. ANS: glucose+ATP→G6P+ADP B: Calculate ΔG∘′ΔG∘′ for this reaction. Express your answer using one decimal place.
If the ΔG°' for ATP hydrolysis is –30 kJ/mol and the ΔG°' for phosphoenolpyruvate hydrolysis is...
If the ΔG°' for ATP hydrolysis is –30 kJ/mol and the ΔG°' for phosphoenolpyruvate hydrolysis is –62 kJ/mol, what is the ΔG°' for the phosphorylation of ADP by phosphoenolpyruvate? a) -32 kJ/mol b) -62 kJ/mol c) +31 kJ/mol d) +92 kJ/mol e) -92 kJ/mol Please provide the appropriate calculation and show the reactions that are involved + the overall reaction. Thank you!
5.The following reaction has a ΔG°'--61.9 kJ/mol at 25°C, Phosphoenolpyruvate (PEP) +H2O Pyruvate + Inorganic Phosphate...
5.The following reaction has a ΔG°'--61.9 kJ/mol at 25°C, Phosphoenolpyruvate (PEP) +H2O Pyruvate + Inorganic Phosphate (Pi) (a) Is the reaction favorable under standard biochemical conditions? Explain your answer. (b) What is the equilibrium constant (K) of this reaction at 25°C? In cells the direct hydrolysis of PEP rarely occurs. Rather, the hydrolysis of PEP and the reverse hydrolysis of ATP are coupled (c) w rite out the coupled reaction and determine its ΔG at 25°C The hydrolysis of ATP...
For the reaction ATP + H2O ⇔ ADP + phosphate, ΔG° = -30.5 kJ/mol. Very high...
For the reaction ATP + H2O ⇔ ADP + phosphate, ΔG° = -30.5 kJ/mol. Very high concentrations of ADP and phosphate (such that Q>>K) would likely have which of the following effects (explain your thinking): a. ΔG would be less negative than ΔG°, because conditions would disfavor the formation of more ADP b. ΔG would be more negative than ΔG°, because conditions would favor the formation of more ADP c. ΔG° and ΔG are unrelated in this case, because conditions...
The standard free energy (ΔG∘′)(ΔG∘′) of the creatine kinase reaction is −12.6 kJ⋅mol−1.−12.6 kJ⋅mol−1. The ΔGΔG...
The standard free energy (ΔG∘′)(ΔG∘′) of the creatine kinase reaction is −12.6 kJ⋅mol−1.−12.6 kJ⋅mol−1. The ΔGΔG value of an in vitro creatine kinase reaction is −0.1 kJ⋅mol−1.−0.1 kJ⋅mol−1. At the start of the reaction, the concentration of ATP is 6 mM,6 mM, the concentration of creatine is 12 mM,12 mM, and the concentration of creatine phosphate is 25 mM.25 mM. Using the values given, calculate the starting concentration of ADP in micromolar.
A non-spontaneous reaction may be driven by coupling it to a reaction that is spontaneous. The...
A non-spontaneous reaction may be driven by coupling it to a reaction that is spontaneous. The formation of glutamine from glutamate and ammonium ions require 14.2 kJ/mol of energy input. It is driven by the hydrolysis of ATP to ADP mediated by the enzyme glutamine synthetase. (a) Given that the change in Gibbs energy for the hydrolysis of ATP corresponds to ΔG = -46 kJ/mol under conditions in a typical cell. (b) How many mols of ATP must be hydrolyzed...
In a typical human cell at 37°C, the concentration of ATP is 3.5E-3M, ADP = 4.5E-3M,...
In a typical human cell at 37°C, the concentration of ATP is 3.5E-3M, ADP = 4.5E-3M, and Pi (HPO4 2-) = 7.6E-3M. Remember that living cells are NOT at equilibrium. ATP + H2O -> ADP + Pi a. What is the actual free energy change (ΔG') for ATP hydrolysis under these physiological conditions? ΔG0' for ATP hydrolysis = -30kJ/mol b. In which direction will the reaction proceed under these conditions? Why?
The protein Src is a signaling molecule that is phosphorylated by acetyl phosphate and dephosphorylated by...
The protein Src is a signaling molecule that is phosphorylated
by acetyl phosphate and dephosphorylated by hydrolysis. Thus, Src
catalyzes the acetyl-phosphate hydrolysis reaction:
PICTURE. Please answer all the problems and explain.
Exam 2: Practice problems Chem4400 1. The protein Sre is a signaling molecule that is phosphory lated by acetyl phosphate and dephosphorylated by hydrolysis. Thus, Sre catalyzes the acetyl-phosphate hydrolysis reaction: (1) CH3CO-Pi (aq) + H20 (l)-→ CH3COOH (aq) + P (a) AG--40. Ik/ / mol As with...
1. 2. 3. Select the true statement regarding thermodynamics. C) The △G" of a reaction is...
1.
2.
3.
Select the true statement regarding thermodynamics. C) The △G" of a reaction is zero at equilibrium. 0 The standard state for solutes is 1.00 M The standard state for gases is 1 Torr. The ΔG of a reaction is independent of the equilibrium constant A reaction proceeds via the following equation A solution of A and B are allowed to react unti the reaction stops. The final concentrations of the reactants and products are 25 mM A...
Given the following data, calculate the ΔG'° for the reaction. Show all mathematical work & indicate...
Given the following data, calculate the ΔG'° for the reaction. Show all mathematical work & indicate proper units. R = 8.315 J/mol·K, T = 25°C, ATP --> ADP + Pi [ΔG'° = -30.5 kJ/mol] Fructose 1,6-bisphosphate --> Fructose 6-phosphate + Pi [ΔG'° = -16.0 kJ/mol]
5.The following reaction has a ΔG°'--61.9 kJ/mol at 25°C, Phosphoenolpyruvate (PEP) +H2O Pyruvate + Inorganic Phosphate (Pi) (a) Is the reaction favorable under standard biochemical conditions? Explain your answer. (b) What is the equilibrium constant (K) of this reaction at 25°C? In cells the direct hydrolysis of PEP rarely occurs. Rather, the hydrolysis of PEP and the reverse hydrolysis of ATP are coupled (c) w rite out the coupled reaction and determine its ΔG at 25°C The hydrolysis of ATP...
The protein Src is a signaling molecule that is phosphorylated
by acetyl phosphate and dephosphorylated by hydrolysis. Thus, Src
catalyzes the acetyl-phosphate hydrolysis reaction:
PICTURE. Please answer all the problems and explain.
Exam 2: Practice problems Chem4400 1. The protein Sre is a signaling molecule that is phosphory lated by acetyl phosphate and dephosphorylated by hydrolysis. Thus, Sre catalyzes the acetyl-phosphate hydrolysis reaction: (1) CH3CO-Pi (aq) + H20 (l)-→ CH3COOH (aq) + P (a) AG--40. Ik/ / mol As with...
1.
2.
3.
Select the true statement regarding thermodynamics. C) The △G" of a reaction is zero at equilibrium. 0 The standard state for solutes is 1.00 M The standard state for gases is 1 Torr. The ΔG of a reaction is independent of the equilibrium constant A reaction proceeds via the following equation A solution of A and B are allowed to react unti the reaction stops. The final concentrations of the reactants and products are 25 mM A...
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