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Glycolysis steps

For each molecule, describe what happens to it in Glycolysis

QuestionAnswer
Glucose Enters Glycolysis and is phosphorylated. 1 ATP is invested. Becomes Glucose 6-Phospate
Glucose 6-Phosphate Is modified by Phosphoglucoisomerase into Fructose 6-Phosphate
Fructose 6-Phosphate Is phosphorylated making it Fructose 1,6-diphosphate. One ATP is invested.
Fructose 1,6-diphosphate Is cleaved into two 3 carbon molecules each with one Phosphate group: Dihydroxyacetone Phosphate and Glyceraldehyde 3-phosphate.
Dihydroxyacetone Phosphate Gets converted into Glyceraldehyde 3-phosphate by an enzyme called isomerase so that it can enter the next phase of Glycolysis - the energy conserving stage.
Glyceraldehyde 3-phosphate (2 Molecules) Is oxydized - transfers H+ to NAD+. Obtains a high energy phosphate bond making it 1,3 diphosphoglyceric acid. (Remember! This rxn is X2!)
1,3-diphosphoglyceric acid (2 Molecules) The high energy phosphate bond is removed from the 1st Carbon - producing ATP. 3-phosphoglyceric acid remains.
3-phosphoglyceric acid (2 molecules) is modified by an enzyme that moves the P group to the 2nd carbon making 2-phosphoglyceric acid.
2-phosphoglyceric acid (2 molecules) loses a H20 molecule. The P group becomes a high energy bond - making Phosphoenolpyruvic Acid.
Phosphoenolpyruvic Acid (2 molecules) The high energy phosphate bond is broken and the P group is transferred to ADP making ATP. Pyruvic Acid is formed
Pyruvic Acid (2 molecules) Pyruvic Acid is free to enter the Krebs Cycle/Citric Acid Cycle.
How many ATPs are used in glycolysis? 2
How many ATPs are produced in glycolysis 4
How many ATPs are NETTED in glycolysis? 2
How many NADH are produced in glycolysis? 2
Created by: BiologyBee
 

 



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