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A-Level Biology OCR A

Fourth Step Atp Triose Biphosphate Molecules Explain Draw

The fourth step of glycolysis includes dehydrogenation, where hydrogen atoms are removed from the two triose biphosphate molecules to form two pyruvate molecules and two reduced NAD (NADH). This step also produces 4 ATP through substrate-level phosphorylation.

The fourth step of glycolysis includes dehydrogenation, where hydrogen atoms are removed from the two triose biphosphate molecules to form two pyruvate molecules and two reduced NAD (NADH). This step also produces 4 ATP through substrate-level phosphorylation.

Front Explain and draw a diagram to show the fourth step of glycolysis.
Back Fourth step - dehydrogenation and formation of ATP
  • Two triose biphosphate mols are oxidised by removal of hydrogen (dehydrogenation)
  • Two pyruvate molecules form
  • NAD coenzymes accept removed hydrogens, forming two reduced NAD molecules
  • At same time, 4 ATP produced using phosphates from triose biphosphate molecles - substrate level phosphorylation

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