Biology / Unit 3 Bio 0605 worked example, 60 to 90 seconds
The Calvin Cycle: Three Stages
Captions available
The idea
The Calvin cycle runs three stages — fixation, reduction, and regeneration — using ATP and NADPH from the light-dependent reactions to build carbohydrate from carbon dioxide in the stroma.
Where people slip
Only one G3P leaves the cycle for every three turns — the other five are spent regenerating RuBP so the cycle can continue at all.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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