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CAIE A-Level Biology 12.2.6 Redox Reactions in the Krebs Cycle

Practise identifying Krebs-cycle decarboxylation, NAD or FAD reduction and substrate-level ATP formation, then link reduced carriers to oxidative phosphorylation.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • identify decarboxylation steps from loss of carbon atoms as carbon dioxide
  • identify dehydrogenation through reduction of NAD or FAD by accepted hydrogen
  • describe direct phosphate transfer to ADP as substrate-level phosphorylation

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