Homework Answers
12) Irreversible steps
a) Glucose to Glucose-6-phosphate
b) Fructose-6-phosphate to Fructose-1,6-biphosphate
c) Phosphoenolpyruvate to Pyruvate
13) First committed step in glycolysis
Fructose-6-phosphate to Fructose-1,6-biphosphate
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12. Which steps of reactions in glycolysis are irreversible? 13. Which reaction is the first committed...
There are three metabolically irreversible reactions in glycolysis. Two of these reactions are made irreversible by...
There are three metabolically irreversible reactions in glycolysis. Two of these reactions are made irreversible by while the third is made irreversible by _ ATP hydrolysis: ATP synthesis ATP hydrolysis: oxidation ATP hydrolysis: enol to keto tautomerization ATP synthesis: oxidation
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...
1. Bypassing the pyruvate kinase reaction. Gluconeogenesis and glycolysis are opposing pathways that share seven enzymes....
1. Bypassing the pyruvate kinase reaction. Gluconeogenesis and glycolysis are opposing pathways that share seven enzymes. The exergonic steps in glycolysis cannot be simply reversed because that would be too energetically costly. Thus, these steps are "bypassed" in gluconeogenesis with a separate set of enzymes. a. Explain why the reaction catalyzed by pyruvate kinase is energetically favorable and essentially irreversible in the cells. b.Explain how the cells that run gluconeogenesis are able to bypass this step with specific reactions that...
In the first step of glycolysis, the given two reactions are coupled... thank you! In the...
In the first step of glycolysis, the given two reactions are
coupled...
thank you!
In the first step of glycolysis, the given two reactions are coupled. reaction 1 glucose P АТР + H,О AG+13.8 kJ/mol AG 30.5 kJ/mol glucose-6-phosphate +H20 ADPP reaction 2: Answer the four questions about the first step of glycolysis Is reaction 2 spontaneous or nonspontaneous? nonspontaneous spontaneous Complete the net chemical equation АТР+ + glucose Calculate the overall AG for the coupled reaction. glucose-6-phosphate ADP AG...
QUESTION 13 Which of the following statements is not true about glycolysis? Some reactions in Glycolysis...
QUESTION 13 Which of the following statements is not true about glycolysis? Some reactions in Glycolysis use NADPH as a source of energy. The first step of glycolysis ensures that glucose is trapped inside the cell The isomerization of DHAP to G3P makes the process of glycolysis efficient The end products of glycolysis are 2 pyruvate molecules, 2 ATPs and 2 NADH ОООО QUESTION 3 ATP is known to be an allosteric inhibitor of an enzyme A. Therefore ATP most...
Which enzymes in glycolysis catalyze reactions thx are irreversible in cellular conditions? Select all that apply....
Which enzymes in glycolysis catalyze reactions thx are irreversible in cellular conditions? Select all that apply. 0 Select all that apply Hexokinase Phosphoglucoisomerase с Phosphofructokinase Aldolase Triose Phosphate Isomerase Glyceraldehyde-3-phosphate dehydrogenase Phosphoglycerate kinase H Phosphoglycerate Mutase Enolase Submit Pyruvate kinase
Recall the first three reactions in glycolysis: You’ve already learned that, in addition to proceeding through...
Recall the first three reactions in glycolysis: You’ve already learned that, in addition to proceeding through glycolysis, glucose 6-phosphate (G6P) can be used to synthesize a carbohydrate storage molecule called glycogen. Glucose 6-phosphate is also a precursor for the synthesis of nucleotides that are used to build DNA and RNA. The first step of this pathway is catalyzed by an enzyme called glucose 6-phosphate dehydrogenase. Assume that reactions in this pathway with double arrows are reversible under cellular conditions, while...
There are two sets of reactions in glycolysis in which phosphate intermediates are synthesized in...
There are two sets of reactions in glycolysis in which phosphate intermediates are synthesized in the first reaction and their energy harvested as ATP in the second reaction. Part A Identify the two sets of reactions. Check all that apply. O Step 1. Phosphorylation Step 2. Isomenzation Step 3. Phosphorylation Step 4. Cleavage Step 5, Isomerization Step 6, Oxidation and Phosphorylaton Step 7. Phosphate Transfer Step 8. Isomerization Step 9, Dehydration C) □ a Step 10. Phosphate Transfer We were...
A) List, in order, the three enzymes that catalyze the highly regulated steps in glycolysis. (Don't...
A) List, in order, the three enzymes that catalyze the highly regulated steps in glycolysis. (Don't just enter 1, 2, 3 for reaction numbers - give the reaction number based on the 10 steps of glycolysis.) Reaction # Enzyme Reaction # Enzyme Reaction # Enzyme B) For each of these reactions, name ONE allosteric regulator of the enzyme and whether that regulator inhibits or activates the enzyme. Reaction # allosteric regulator Inhibitor or activator? Reaction # allosteric regulator Inhibitor or...
1. Fill in the blanks, Glycolysis is taking place almost all organisms and almost all the...
1. Fill in the blanks, Glycolysis is taking place almost all organisms and almost all the cells. At rest, some tissues prefer fat as their energy source. For example, at rest, skeletal muscles is prefer fat as the energy source. However, energy provided by glucose metabolism is the sole source of energy for and Glycolyitc pathway is in this part of the cell: 2. Write overall reaction in glycolysis 3. Glycolysis has 10 steps. Why is 1" half called investing...
There are three metabolically irreversible reactions in glycolysis. Two of these reactions are made irreversible by while the third is made irreversible by _ ATP hydrolysis: ATP synthesis ATP hydrolysis: oxidation ATP hydrolysis: enol to keto tautomerization ATP synthesis: oxidation
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...
In the first step of glycolysis, the given two reactions are
coupled...
thank you!
In the first step of glycolysis, the given two reactions are coupled. reaction 1 glucose P АТР + H,О AG+13.8 kJ/mol AG 30.5 kJ/mol glucose-6-phosphate +H20 ADPP reaction 2: Answer the four questions about the first step of glycolysis Is reaction 2 spontaneous or nonspontaneous? nonspontaneous spontaneous Complete the net chemical equation АТР+ + glucose Calculate the overall AG for the coupled reaction. glucose-6-phosphate ADP AG...
QUESTION 13 Which of the following statements is not true about glycolysis? Some reactions in Glycolysis use NADPH as a source of energy. The first step of glycolysis ensures that glucose is trapped inside the cell The isomerization of DHAP to G3P makes the process of glycolysis efficient The end products of glycolysis are 2 pyruvate molecules, 2 ATPs and 2 NADH ОООО QUESTION 3 ATP is known to be an allosteric inhibitor of an enzyme A. Therefore ATP most...
Which enzymes in glycolysis catalyze reactions thx are irreversible in cellular conditions? Select all that apply. 0 Select all that apply Hexokinase Phosphoglucoisomerase с Phosphofructokinase Aldolase Triose Phosphate Isomerase Glyceraldehyde-3-phosphate dehydrogenase Phosphoglycerate kinase H Phosphoglycerate Mutase Enolase Submit Pyruvate kinase
There are two sets of reactions in glycolysis in which phosphate intermediates are synthesized in the first reaction and their energy harvested as ATP in the second reaction. Part A Identify the two sets of reactions. Check all that apply. O Step 1. Phosphorylation Step 2. Isomenzation Step 3. Phosphorylation Step 4. Cleavage Step 5, Isomerization Step 6, Oxidation and Phosphorylaton Step 7. Phosphate Transfer Step 8. Isomerization Step 9, Dehydration C) □ a Step 10. Phosphate Transfer We were...
A) List, in order, the three enzymes that catalyze the highly regulated steps in glycolysis. (Don't just enter 1, 2, 3 for reaction numbers - give the reaction number based on the 10 steps of glycolysis.) Reaction # Enzyme Reaction # Enzyme Reaction # Enzyme B) For each of these reactions, name ONE allosteric regulator of the enzyme and whether that regulator inhibits or activates the enzyme. Reaction # allosteric regulator Inhibitor or activator? Reaction # allosteric regulator Inhibitor or...
1. Fill in the blanks, Glycolysis is taking place almost all organisms and almost all the cells. At rest, some tissues prefer fat as their energy source. For example, at rest, skeletal muscles is prefer fat as the energy source. However, energy provided by glucose metabolism is the sole source of energy for and Glycolyitc pathway is in this part of the cell: 2. Write overall reaction in glycolysis 3. Glycolysis has 10 steps. Why is 1" half called investing...
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