Biology / Unit 3 Bio 0609 worked example, 60 to 90 seconds
C3, C4, and CAM Compared
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The idea
C3, C4, and CAM plants all fix carbon with RuBisCO in the Calvin cycle, but differ in how — or when — they keep RuBisCO's local environment carbon-rich enough to avoid photorespiration.
Where people slip
CAM's day/night separation and C4's mesophyll/bundle-sheath separation both solve photorespiration; neither approach makes C3 photosynthesis obsolete.
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