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The Krebs cycle

The link reaction and the Krebs cycle on one map. Tap a molecule or an arrow to see what happens there. Pick your exam board for its wording, count the carbons and the coenzymes, then quiz yourself or try an exam question.

The Krebs cycle and the link reaction Pyruvate becomes acetyl coenzyme A in the link reaction. Oxaloacetate, citrate and two intermediates sit on a loop. Arrows show each step, coloured by step. Dashed arrows show coenzyme A joining, and carbon dioxide, reduced coenzymes and ATP leaving. The same steps are listed as a table below the map.
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Every step on the map

The same steps as the map, as a list, in the wording of the board you picked. Use it to revise, or print this page.

What one turn makes