Homework Answers
ATP + H2O <====> ADP + Pi ΔGo' = -31 kJ/mole ----------- (1)
Pi + Glucose <=====> Glucose-6-P + H2O ΔGo' = +14 kJ/mole ------ (2)
Equation (1) + Equation (2)
ATP + Glucose <=====> Glucose-6-P + ADP ΔGo' = -31 kJ/mole +14 kJ/mole = -17 KJ/mole
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16) In the reaction catalyzed by hexokinase, the two half reactions and their AGº values are...
2. The first step in glycolysis is catalyzed by the enzyme herokinase: glucose + ATP glucose-6-P...
2. The first step in glycolysis is catalyzed by the enzyme herokinase: glucose + ATP glucose-6-P + ADP This reaction can be thought of as two coupled reactions (P is phosphate): (1) glucose + P + glucose-6-P (2) ATP + ADP + P For the overall reaction, AG" = -16.7 kJ/mol. For the hydrolysis of ATP (equation 2), AG = -310 kJ/mol. All reactions are performed at 37°C. (a) What is AGº for reaction 1? Iglucose - 6-11 if AG...
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. Hexokinase catalyzes the ATP-dependent phosphorylation of a broad spectrum of 6- carbon sugars. In the...
1. Hexokinase catalyzes the ATP-dependent phosphorylation of a broad spectrum of 6- carbon sugars. In the reaction involving glucose and ATP, glucose-6-phosphate (G6P) and ADP are formed. D-Glucose + ATP G6P + ADP + Ht (AG",--20.9 kJ/mol). The enzyme specifically recognizes the acetal form of glucose, (a-D-glucopyranose. a. Draw the linear form of glucose using a Fischer projection and draw the structure of (a-D-glucopyranose. (5 pts each) b. Provide the net reaction for glycolysis. (5 pts) c. Assuming lysine acts...
3. (3 pts) The following amination reaction is catalyzed by the enzyme alanine synthetase ADP +...
3. (3 pts) The following amination reaction is catalyzed by the enzyme alanine synthetase ADP + Pi + alanine ATP +pyruvate +NH3 Use the following equations with AG values given in kJ/mol to calculate AG for the overall reaction: ATP+H2O ADP + Pi Alanine+H2Opyruvate + NH3 (-30.5) (-6.0)
7.5 Hexokinase catalyzes the reaction: ATP + Glucose A glucose-6-phosphate + ADP AG - -4 562...
7.5 Hexokinase catalyzes the reaction: ATP + Glucose A glucose-6-phosphate + ADP AG - -4 562 cal / mol Keg = 2.21 x 103 Calculate the concentration of glucose-6-phosphate necessary to force the hexokinase reaction to go in the opposite direction (towards the synthesis of glucose and ATP) in the presence of 10-5 M glucose, 10-3 M ATP and 10-4 M ADP.
In the first step of glycolysis, the given two reactions are coupled. reaction 1: reaction 2:...
In the first step of glycolysis, the given two reactions are coupled. reaction 1: reaction 2: glucose +P: ATP + H2O glucose-6-phosphate + H,O + ADP + P AG = +13.8 kJ/mol AG = -30.5 kJ/mol Answer the four questions about the first step of glycolysis. Is reaction 2 spontaneous or nonspontaneous? O nonspontaneous O spontaneous Complete the net chemical equation. ATP+ + Calculate the overall AG for the coupled reaction. AG = kJ/mol Is the first step in glycolysis...
2. Hydrolysis of 0.5 M studentose catalyzed by teacherase to become successose is 95% complete at...
2. Hydrolysis of 0.5 M studentose catalyzed by teacherase to become successose is 95% complete at equilibrium (i.e., only 5% of the studentose remains). What is AG"? (R = 8.315 J/mol K; T = 298 K) 3. The standard free-energy changes for the reactions below are given. Phosphocreatine creatine + Pi AG"=-43.0 kJ/mol ATP → ADP + Pi AG" = -30.5 kJ/mol The overall AG" for the reaction: Phosphocreatine + ADP creatine + ATP, is _ A) -73.5 kJ/mol C)...
1) SHOW WORK 12. During glycolysis, glucose 1-phosphate is converted to fructose 6-phosphate in two successive...
1) SHOW WORK
12. During glycolysis, glucose 1-phosphate is converted to fructose 6-phosphate in two successive reactions: glucose 1-phosphate → glucose 6-phosphate glucose 6-phosphate + fructose 6-phosphate AG'' = -7.1 kJ/mol AG'º = +1.7 kJ/mol 13. The standard free-energy changes for the reactions below are given. phosphocreatine → creatine + Pi ATP → ADP + Pi AG" = 43.0 kJ/mol AG" = -30.5 kJ/mol What is the overall AG' for the following reaction? Iw a dee Hydrolysis of 1 M...
Hexokinase catalyzes the following reaction in glycolysis: Glucose + ATP ← → glucose-6-phosphate + ADP The...
Hexokinase catalyzes the following reaction in glycolysis: Glucose + ATP ← → glucose-6-phosphate + ADP The standard free-energy change for this reaction in the direction written is -16.7 kJ/mol. The concentrations of the related reaction components in the hepatocyte of a mammalian cell are: Glucose: 6 mM Glucose-6-phosphate: 0.074 mM ATP: 1.00 mM ADP: 0.25 mM What is the actual free-energy change for the reaction at body temperature (37 C)?
CHEM 351 Biochemistry I - Fall 2018 Study Problems for Metabolism and Glucose Catabolism For the...
CHEM 351 Biochemistry I - Fall 2018 Study Problems for Metabolism and Glucose Catabolism For the reaction: aA + bB =cC + dD Gibbs free energy: AG = AG" + RT IN THE glucose + glucose 6-phosphate + H20 1. The equilibrium constant for phosphorylation of glucose is: Ke = 3.97 x 10- a. Calculate the standard Gibbs free energy for the uncatalyzed reaction. b. Use the physiological concentrations for glucose (2.0 mm) and inorganic phosphate (20 mM) to determine...
2. The first step in glycolysis is catalyzed by the enzyme herokinase: glucose + ATP glucose-6-P + ADP This reaction can be thought of as two coupled reactions (P is phosphate): (1) glucose + P + glucose-6-P (2) ATP + ADP + P For the overall reaction, AG" = -16.7 kJ/mol. For the hydrolysis of ATP (equation 2), AG = -310 kJ/mol. All reactions are performed at 37°C. (a) What is AGº for reaction 1? Iglucose - 6-11 if AG...
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. Hexokinase catalyzes the ATP-dependent phosphorylation of a broad spectrum of 6- carbon sugars. In the reaction involving glucose and ATP, glucose-6-phosphate (G6P) and ADP are formed. D-Glucose + ATP G6P + ADP + Ht (AG",--20.9 kJ/mol). The enzyme specifically recognizes the acetal form of glucose, (a-D-glucopyranose. a. Draw the linear form of glucose using a Fischer projection and draw the structure of (a-D-glucopyranose. (5 pts each) b. Provide the net reaction for glycolysis. (5 pts) c. Assuming lysine acts...
3. (3 pts) The following amination reaction is catalyzed by the enzyme alanine synthetase ADP + Pi + alanine ATP +pyruvate +NH3 Use the following equations with AG values given in kJ/mol to calculate AG for the overall reaction: ATP+H2O ADP + Pi Alanine+H2Opyruvate + NH3 (-30.5) (-6.0)
In the first step of glycolysis, the given two reactions are coupled. reaction 1: reaction 2: glucose +P: ATP + H2O glucose-6-phosphate + H,O + ADP + P AG = +13.8 kJ/mol AG = -30.5 kJ/mol Answer the four questions about the first step of glycolysis. Is reaction 2 spontaneous or nonspontaneous? O nonspontaneous O spontaneous Complete the net chemical equation. ATP+ + Calculate the overall AG for the coupled reaction. AG = kJ/mol Is the first step in glycolysis...
2. Hydrolysis of 0.5 M studentose catalyzed by teacherase to become successose is 95% complete at equilibrium (i.e., only 5% of the studentose remains). What is AG"? (R = 8.315 J/mol K; T = 298 K) 3. The standard free-energy changes for the reactions below are given. Phosphocreatine creatine + Pi AG"=-43.0 kJ/mol ATP → ADP + Pi AG" = -30.5 kJ/mol The overall AG" for the reaction: Phosphocreatine + ADP creatine + ATP, is _ A) -73.5 kJ/mol C)...
1) SHOW WORK
12. During glycolysis, glucose 1-phosphate is converted to fructose 6-phosphate in two successive reactions: glucose 1-phosphate → glucose 6-phosphate glucose 6-phosphate + fructose 6-phosphate AG'' = -7.1 kJ/mol AG'º = +1.7 kJ/mol 13. The standard free-energy changes for the reactions below are given. phosphocreatine → creatine + Pi ATP → ADP + Pi AG" = 43.0 kJ/mol AG" = -30.5 kJ/mol What is the overall AG' for the following reaction? Iw a dee Hydrolysis of 1 M...
CHEM 351 Biochemistry I - Fall 2018 Study Problems for Metabolism and Glucose Catabolism For the reaction: aA + bB =cC + dD Gibbs free energy: AG = AG" + RT IN THE glucose + glucose 6-phosphate + H20 1. The equilibrium constant for phosphorylation of glucose is: Ke = 3.97 x 10- a. Calculate the standard Gibbs free energy for the uncatalyzed reaction. b. Use the physiological concentrations for glucose (2.0 mm) and inorganic phosphate (20 mM) to determine...
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