1. The conversion of glucose-1-phosphate to UDP-glucose has a ΔG0’ near zero. Which of the following...
1. The conversion of glucose-1-phosphate to UDP-glucose has a ΔG0’ near zero. Which of the following reactions is coupled with the previous reaction to drive it to completion?
A) Hydrolysis of PPi
B) Hydrolysis of ATP
C) Hydrolysis of ADP
D) Hydrolysis of UDP
E) Hydrolysis of UTP
The correct answer is A... Please explain
Homework Answers
due to the presence of the ubiquitous enzyme pyrophosphatase, which quickely hydrolyzes pyrophosphate.One of the early steps in glycogenesis is formation of UDP-glucose from glucose-1-phosphate and UTP according to the reaction:
Glucose-1-phosphate + UTP → UDP-glucose + PPi
One would expect this reaction to occur spontaneously if ΔG° were
large and negative, but in fact, ΔG° for this reaction will be
zero.
Add Answer to:
1. The conversion of glucose-1-phosphate to UDP-glucose has a
ΔG0’ near zero. Which of the following...
The formation of glucose-1-phosphate from glucose and orthophosphate has a G of + 20.9 kJ/mol. If...
The formation of glucose-1-phosphate from glucose and orthophosphate has a G of + 20.9 kJ/mol. If this reaction were coupled to another reaction in order to produce an exergonic reaction, which of the following would produce an overall endergonic reaction and therefore not be suitable for coupling? A) creatine phosphate + H2O creatine + Pi B) AMP + H2O adenosine + Pi C) ATP + H2O AMP + PPi D) ATP + H2O ADP + Pi...
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...
Consider the following reaction: Glucose + ATP ↔Glucose -6-phosphate + ADP Using the information in the...
Consider the following reaction:
Glucose + ATP ↔Glucose -6-phosphate + ADP
Using the information in the below determine Go for
this reaction and comment on the spontaneity of this reaction.
What the information does the Go parameters in the
table below provides about the rate of the ATP hydrolysis.
Below is the structure of glucose-6-phosphate. Identify which
anomer does it represent?
Standard free energies of hydrolysis of some
phosphorylated compounds
compound
Go (kJ mol-1)
ATP (to ADP)
-30.5
pyrophosphate
-19.3...
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...
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...
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...
Glycolysis is the process by which energy is harvested from glucose by living things. Several of...
Glycolysis is the process by which energy is harvested from glucose by living things. Several of the reactions of glycolysis are thermodynamically unfavorable (nonspontaneous), but proceed when they are coupled with other reactions. Reaction A: P + glucose glucose-6-phosphate +HO AG13.8 kJ/mol Reaction B: P fructose-6-phosphate + fructose-1,6-bisphosphate +1,0 AG 16.3 kJ/mol Reaction C: ATP+H, ADP +P, AG - 30.5 kJ/mol Select every unfavorable reaction. reaction B reaction C reaction A Select every set of coupled reactions where the overall...
1. 2. 3. 4. Select all that apply. Identify the reaction(s) of glycolysis inhibited by ATP □ glyceraldehyde-3-phosphate → 1,3-bisphosphoglycerate phosphoenolpyruvate +pyruvate 3-phosphoglycerate...
1.
2.
3.
4.
Select all that apply. Identify the reaction(s) of glycolysis inhibited by ATP □ glyceraldehyde-3-phosphate → 1,3-bisphosphoglycerate phosphoenolpyruvate +pyruvate 3-phosphoglycerate ~2-phosphoglycerate 1) fructose-6-phosphate→ fructose-1,6-bisphosphate . glucose glucose-6-phosphate Select all that apply. Alcohol fermentation: consumes ATP as it produces ethanol. O produces carbon dioxide begins as pyruvate is decarboxylated to acetaldehyde in a reaction catalyzed by alcohol dehydrogenase m regenerates NAD requires the enzyme alcohol dehydrogenase, In the figure below, what is the reaction occurring at the location...
the following questions Fructose-1.6- Fructose-6 ADP phosphate phosphate ATP ADP diphosphate Glucose-6 F ATP Glucose-→ Glucose-p)→...
the following questions Fructose-1.6- Fructose-6 ADP phosphate phosphate ATP ADP diphosphate Glucose-6 F ATP Glucose-→ Glucose-p)→ Fructose-P P-Fructose-(P FIGURE 5.7 glyceraldyde 3-phosphate P) ADP H-C-OH H20-P 1,3 diphospho- glycerate CH20-P 3 phospho glycerate phosphoenol pyruvate 15) Which step in Figure 5.7 shows a split of one molecule into two smaller molecules? 15) 4) 2 B) 4 )6 Dy H E) 5 16) Which step in Figure 5.7 shows a reaction involving a dehydrogenase? D) 8 A) 2 C) 6 E)5...
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...
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...
Consider the following reaction:
Glucose + ATP ↔Glucose -6-phosphate + ADP
Using the information in the below determine Go for
this reaction and comment on the spontaneity of this reaction.
What the information does the Go parameters in the
table below provides about the rate of the ATP hydrolysis.
Below is the structure of glucose-6-phosphate. Identify which
anomer does it represent?
Standard free energies of hydrolysis of some
phosphorylated compounds
compound
Go (kJ mol-1)
ATP (to ADP)
-30.5
pyrophosphate
-19.3...
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...
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...
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...
Glycolysis is the process by which energy is harvested from glucose by living things. Several of the reactions of glycolysis are thermodynamically unfavorable (nonspontaneous), but proceed when they are coupled with other reactions. Reaction A: P + glucose glucose-6-phosphate +HO AG13.8 kJ/mol Reaction B: P fructose-6-phosphate + fructose-1,6-bisphosphate +1,0 AG 16.3 kJ/mol Reaction C: ATP+H, ADP +P, AG - 30.5 kJ/mol Select every unfavorable reaction. reaction B reaction C reaction A Select every set of coupled reactions where the overall...
1.
2.
3.
4.
Select all that apply. Identify the reaction(s) of glycolysis inhibited by ATP □ glyceraldehyde-3-phosphate → 1,3-bisphosphoglycerate phosphoenolpyruvate +pyruvate 3-phosphoglycerate ~2-phosphoglycerate 1) fructose-6-phosphate→ fructose-1,6-bisphosphate . glucose glucose-6-phosphate Select all that apply. Alcohol fermentation: consumes ATP as it produces ethanol. O produces carbon dioxide begins as pyruvate is decarboxylated to acetaldehyde in a reaction catalyzed by alcohol dehydrogenase m regenerates NAD requires the enzyme alcohol dehydrogenase, In the figure below, what is the reaction occurring at the location...
the following questions Fructose-1.6- Fructose-6 ADP phosphate phosphate ATP ADP diphosphate Glucose-6 F ATP Glucose-→ Glucose-p)→ Fructose-P P-Fructose-(P FIGURE 5.7 glyceraldyde 3-phosphate P) ADP H-C-OH H20-P 1,3 diphospho- glycerate CH20-P 3 phospho glycerate phosphoenol pyruvate 15) Which step in Figure 5.7 shows a split of one molecule into two smaller molecules? 15) 4) 2 B) 4 )6 Dy H E) 5 16) Which step in Figure 5.7 shows a reaction involving a dehydrogenase? D) 8 A) 2 C) 6 E)5...
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...
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