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...
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...
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...
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]
A critical reaction in the production of energy to do work or drive chemical reactions in...
A critical reaction in the production of energy to do work or
drive chemical reactions in biological systems is the hydrolysis of
adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as
described by
ATP(aq)+ H2O(l)
ADP(aq) + H2PO4(aq)
for which ΔG°rxn = –30.5 kJ/mol at 37.0 °C and pH 7.0. Calculate
the value of ΔGrxn in a biological cell in which [ATP] = 5.0 mM,
[ADP] = 0.80 mM, and [HPO42–] = 5.0 mM.
Grxn
= ___ KJ/mol
Is the hydrolysis...
A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydr...
A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by ATP(aq) + H2O(l) --> ADP(aq) + HPO4(aq) or which ΔG°rxn = –30.5 kJ/mol at 37.0 °C and pH 7.0. Calculate the value of ΔGrxn in a biological cell in which [ATP] = 5.0 mM, [ADP] = 0.50 mM, and [HPO42–] = 5.0 mM. Delta Grxn =
the enzyme hexokinase can catalyze the following reaction: fructose + ATP -> fructose 6 phosphate +...
the enzyme hexokinase can catalyze the following
reaction:
fructose + ATP -> fructose 6 phosphate + adp
if the deltaG of hydrolysis of fructose 6 phosphate to
fructose + Pi is -13.8 kj/mol and hydrolysis of atp to adp + pi is
-30kj/mol, calculate Keq for the reaction above (R = 8.31 j mol-1
K-1, T = 298 k
3a. The enzyme hexokinase can catalyze the following reaction: Fructose + ATP → Fructose-6-phosphate + ADP If the ΔGo of hydrolysis...
1. In a cell, a thermodynamically unfavorable process can occur if the process is coupled to...
1. In a cell, a thermodynamically unfavorable process can occur if the process is coupled to a thermodynamically favorable process. the process is thermodynamically favorable outside the cell. an enzyme gives energy to the reacting substances. the cell as a whole is close to equilibrium. 2. In an active transport protein, ATP hydrolysis creates a channel through the membrane. ATP uses the protein to move across the membrane. ATP hydrolysis causes the protein to change shape. ATP carries a substance...
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...
A critical reaction in the production of energy to do work or
drive chemical reactions in biological systems is the hydrolysis of
adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as
described by
ATP(aq)+ H2O(l)
ADP(aq) + H2PO4(aq)
for which ΔG°rxn = –30.5 kJ/mol at 37.0 °C and pH 7.0. Calculate
the value of ΔGrxn in a biological cell in which [ATP] = 5.0 mM,
[ADP] = 0.80 mM, and [HPO42–] = 5.0 mM.
Grxn
= ___ KJ/mol
Is the hydrolysis...
the enzyme hexokinase can catalyze the following
reaction:
fructose + ATP -> fructose 6 phosphate + adp
if the deltaG of hydrolysis of fructose 6 phosphate to
fructose + Pi is -13.8 kj/mol and hydrolysis of atp to adp + pi is
-30kj/mol, calculate Keq for the reaction above (R = 8.31 j mol-1
K-1, T = 298 k
3a. The enzyme hexokinase can catalyze the following reaction: Fructose + ATP → Fructose-6-phosphate + ADP If the ΔGo of hydrolysis...
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