Homework Answers
23: Mg2+ is important in ATP hydrolysis reaction as Mg2+ interacts with substrates through inner sphere coordination, stabilising anions or reactive intermediates, also including binding to ATP and activating the molecule to nucleophilic attack
25: Under “standard” conditions (i.e. concentrations of 1M for all reactants except water which is taken at its characteristic concentration of 55M) the Gibbs free energy of ATP hydrolysis varies from -28 to -34 kJ/mol depending on the concentration of the cation Mg2+. The dependence on Mg ions occurs because the positively-charged magnesium ions help to stabilize the ATP molecule.
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23. Why Mg2+ is important in ATP hydrolysis reaction? 25. What is the AG" of acetyl-CoA...
What is the chemical reaction that involves oxaloacetate and acetyl-coa in the tca cycle? a. hydration...
What is the chemical reaction that involves oxaloacetate and acetyl-coa in the tca cycle? a. hydration b. oxidation c. reduction d. hydrolysis e. none of the above
er at initial change (AG The standard free energy change (AG) for ATP hydrolysis is -30.5 kJ/ mol ATP, ADP, and I a...
er at initial change (AG The standard free energy change (AG) for ATP hydrolysis is -30.5 kJ/ mol ATP, ADP, and I are mixed together at initial concentrations of 1 M each then left alone until the reaction below has come to equilibrium. For each species (ie. ATP. ADP and P.) indicate whether the concentration will be equal to 1 M, less than 1 M, or greater than 1 M after the reaction had reached equilibrium. Explain why. ATP +...
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...
KULL Illustrate the ATP hydrolysis reaction its regeneration and the AG for both reactions. Show where...
KULL Illustrate the ATP hydrolysis reaction its regeneration and the AG for both reactions. Show where energy is released in each reaction In the boxes below, Allustrate and describe THREE WAYS IN WHICH ATP HYDROLYSIS provides energy in biological systems ccorrit Module Problem 2.15
please help! thanks TABLE 12-4 Standard Free Energy Change for Phosphate Hydrolysis Compound AGⓇ' (kJ. mol-')...
please help! thanks
TABLE 12-4 Standard Free Energy Change for Phosphate Hydrolysis Compound AGⓇ' (kJ. mol-') Phosphoenolpyruvate -61.9 1,3-Bisphosphoglycerate -49.4 ATP → AMP + PP, -45.6 Phosphocreatine -43.1 ATP ADP + P -30.5 Glucose-1-phosphate -20.9 PP, 2P, -19.2 Glucose-6-phosphate -13.8 Glycerol-3-phosphate -9.2 thioester bond AGⓇ' = -31.5 kJ•mol-1 H20 O CH3 -C-s-CoA I CH3 -C-0- + COA-SH Acetyl-CoA The formation of acetyl CoA from acetate is an ATP driven reaction: Acetate + ATP + COA <--> acetyl COA + AMP...
8. Draw the overall coupled reaction showing the conversion of pyruvate into acetyl CoA. dono STEP...
8. Draw the overall coupled reaction showing the conversion of pyruvate into acetyl CoA. dono STEP 2 nach do not ww what are true. Ir raise, change one word in the statement so that it is true. a. The pyruvate produced from glycolysis must be consumed in some way or glycolysis stops. b. Glycolysis produces ATP directly. too C. Glycolysis breaks down glucose into acetyl CoA. d. Glycolysis is aerobic
Biochemistry What is the AG for the hydrolysis of ATP under cellular conditions where: [ATP] =...
Biochemistry
What is the AG for the hydrolysis of ATP under cellular conditions where: [ATP] = 3 mm [ADP] = 1 mM [Pi] = 5 mM А -30.5 kJ/mol B -35.0 kJ/mol с -44.0 kJ/mol D -47.0 kJ/mol E -50.0 kJ/mol
Adenosine triphosphate (ATP) is the main "energy currency" used in cells. ATP hydrolysis is coupled with...
Adenosine triphosphate (ATP) is the main "energy currency" used in cells. ATP hydrolysis is coupled with unfavorable reactions, making the net change in energy for the set of reactions less than zero (favorable). Although ATP is the main energy currency, other molecules can fulfill this role and take part in coupled reactions. Determine whether each of the phrases or examples describes a thioester, reduced cofactor, or phosphorylated compound: Acetyl CoA, Ubiquinol, Phosphocreatine, the Sulfur-Carbon bond is hydrolyzed, These compounds yield...
b. Demonstrate the total energy yield in terms of ATP equivalents for the complete catabom acetyl...
b. Demonstrate the total energy yield in terms of ATP equivalents for the complete catabom acetyl CoA molecule. Enzyme name ATP or GTP from NADH FADH2 ATP substrate-level equivalents phosphorylation TOTAL [2 marks] c. Explain why the TCA cycle is important for both anabolism and catabolism (amphibolic reactions). [2 marks]
4. (20 points) The reaction of pyruvate to acetyl-CoA and CO2 is the bridge reaction between...
4. (20 points) The reaction of pyruvate to acetyl-CoA and CO2 is the bridge reaction between glycolysis and the citric acid cycle. The carbon atoms in pyruvate are numbered and where they end up in the products are indicated CO0Θ 2 C=O + HS-CoA 3 CH3 Pyruvate S-COA 2C=O 3 CH3 Acetyl CoA Pyruvate dehydrogenase +1 CO2 a) Is C atom 1 in CO2 in a more reduced state or more oxidized state compared to its state in pyruvate? Why?...
er at initial change (AG The standard free energy change (AG) for ATP hydrolysis is -30.5 kJ/ mol ATP, ADP, and I are mixed together at initial concentrations of 1 M each then left alone until the reaction below has come to equilibrium. For each species (ie. ATP. ADP and P.) indicate whether the concentration will be equal to 1 M, less than 1 M, or greater than 1 M after the reaction had reached equilibrium. Explain why. 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...
KULL Illustrate the ATP hydrolysis reaction its regeneration and the AG for both reactions. Show where energy is released in each reaction In the boxes below, Allustrate and describe THREE WAYS IN WHICH ATP HYDROLYSIS provides energy in biological systems ccorrit Module Problem 2.15
please help! thanks
TABLE 12-4 Standard Free Energy Change for Phosphate Hydrolysis Compound AGⓇ' (kJ. mol-') Phosphoenolpyruvate -61.9 1,3-Bisphosphoglycerate -49.4 ATP → AMP + PP, -45.6 Phosphocreatine -43.1 ATP ADP + P -30.5 Glucose-1-phosphate -20.9 PP, 2P, -19.2 Glucose-6-phosphate -13.8 Glycerol-3-phosphate -9.2 thioester bond AGⓇ' = -31.5 kJ•mol-1 H20 O CH3 -C-s-CoA I CH3 -C-0- + COA-SH Acetyl-CoA The formation of acetyl CoA from acetate is an ATP driven reaction: Acetate + ATP + COA <--> acetyl COA + AMP...
8. Draw the overall coupled reaction showing the conversion of pyruvate into acetyl CoA. dono STEP 2 nach do not ww what are true. Ir raise, change one word in the statement so that it is true. a. The pyruvate produced from glycolysis must be consumed in some way or glycolysis stops. b. Glycolysis produces ATP directly. too C. Glycolysis breaks down glucose into acetyl CoA. d. Glycolysis is aerobic
Biochemistry
What is the AG for the hydrolysis of ATP under cellular conditions where: [ATP] = 3 mm [ADP] = 1 mM [Pi] = 5 mM А -30.5 kJ/mol B -35.0 kJ/mol с -44.0 kJ/mol D -47.0 kJ/mol E -50.0 kJ/mol
b. Demonstrate the total energy yield in terms of ATP equivalents for the complete catabom acetyl CoA molecule. Enzyme name ATP or GTP from NADH FADH2 ATP substrate-level equivalents phosphorylation TOTAL [2 marks] c. Explain why the TCA cycle is important for both anabolism and catabolism (amphibolic reactions). [2 marks]
4. (20 points) The reaction of pyruvate to acetyl-CoA and CO2 is the bridge reaction between glycolysis and the citric acid cycle. The carbon atoms in pyruvate are numbered and where they end up in the products are indicated CO0Θ 2 C=O + HS-CoA 3 CH3 Pyruvate S-COA 2C=O 3 CH3 Acetyl CoA Pyruvate dehydrogenase +1 CO2 a) Is C atom 1 in CO2 in a more reduced state or more oxidized state compared to its state in pyruvate? Why?...
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