The Calvin cycle reactions only occur in bundle sheath cells in a C₄ plant A) to shield the Calvin cycle reactions from O₂ in the leaf spaces. B) to allow O₂ to enter bundle sheath cells. C) because rubisco is only found in mesophyll cells. D) so that they are adjacent to stomata. E) so that H₂O is not available to mesophyll cells.

Question

Quizplus · Accepted Answer

C₄ plants must close stomata to reduce water loss. Closing the stomata results in the accumulation of O₂ while the amount of CO₂ diminishes. The Calvin cycle reactions are performed in the bundle sheath cells to ensure that rubisco uses CO₂ and not O₂ .

The Calvin Cycle Reactions Only Occur in Bundle Sheath Cells