Out of the 10 steps of glycolysis, the first, third and 10th steps are termed as irreversible reactions.
In the first and the third terms, ATP is converted to ADP, thus being hydrolysed.
In the last step, the phosphoenolpyruvate is converted to pyruvate , thus getting tautomerized.
Therfore, the correct answer is c)ATP hydrolysis; enol to keto tautomerization
In case of any doubts, let me know in the comments
There are three metabolically irreversible reactions in glycolysis. Two of these reactions are made irreversible by...
Question 1Coupled Reactions: (a) Calculate Keq for the metabolically unfavourable reaction A → B, for which DGo’=25 kJ mol-1 (b) Using DGo ’ = -32.2 kJ mol-1 for the hydrolysis of ATP, calculate Keq for the coupled reaction A + ATP + H2O → B + ADP + Pi (Hint: consider the two half reactions separately) (c) Assuming the ratio of ATP:[ADP x Pi] is 10-4 , calculate the ratio of A:B in the coupled reaction. (d) How do the...
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12. Which steps of reactions in glycolysis are irreversible? 13. Which reaction is the first committed step of reaction in glycolysis?
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...
11. In glycolysis, the hydrolysis of phosphoenol pyruvate is thermodynamically driven by the highly exergonic enol-to-keto conversion of pyruvate. From the two half reactions shown below, what is the AGo of the complete reaction? (5 pts) Half Reactions COO C00 C-O-PO," + H2O C-O-H + HPO, AGʻ=-16 kJ. mol-! н н н н COO COO C=0 H-C-H ċ-0-H AGO = 45.9 kJ. mol- HH Complete Reaction COO ÇOO C-O-PO," + H2O C=O + HPO, H-C-H с HH
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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...
During glycolysis, the addition of a new phosphate group on to a substrate can be catalyzed by which class(es) of enzymes? Kinase and phosphorylase Kinase and transferase Mutase and Isomerase Phosphorylase and Mutase QUESTION 17 Which of the following factors makes hydrolysis of acetyl coA a favorable process? Enol-keto tautomerization Increased delocalization of the pl-cloud Change of non-aromatic structure to aromatic structure Separation of like charges Substrate Level phosphorylation occurs during glycolysis... step 6, during the formation of 1,3 bisphosphoglycerate...
In Glycolysis the first five reactions involve: Oxidation of acetyl CoA Oxidation of pyruvate Release of energy Preparation of glucose to be split. NAD+ is regenerated by: ATP synthase Lactate dehydrogenase Rubisco Under aerobic conditions pyruvate: