It might help you to understand all of this if we look at what goes in and what comes out of the Calvin cycle.
Adjacent to a frequently-asked paragraph in the same chapter.
Why does the step labelled 1 in the diagram occur?
Correct answer: A — To release CO₂ for fixation in the Calvin cycle
The diagram clearly shows C₄ acid being decarboxylated in bundle sheath to release CO₂.
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