Master the Krebs Cycle fast ⚡ – clear explanations, OCR-aligned.
You’ll cover
• The role of the Krebs cycle in the complete oxidation of glucose.
• What happens when acetyl-CoA combines with oxaloacetate to begin the cycle.
• Decarboxylation reactions that release carbon dioxide.
• Dehydrogenation reactions that produce reduced NAD and reduced FAD.
• How ATP is produced through substrate-level phosphorylation.
• Why the Krebs cycle turns twice for every glucose molecule respired.
What’s included
• Clear labelled diagram showing the simplified Krebs cycle and its key intermediates.
• Step-by-step summary of the major reactions occurring during one turn of the cycle.
• Model exam-style explanation demonstrating the level of detail expected in OCR A-level answers.
• Table outlining the main substances involved in the Krebs cycle and their roles, including the number of molecules produced or used per glucose molecule.