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← Nature & AnimalsWhich restriction follows from photorespiration occuring due to high oxygen?
A)Reduced effectiveness of C3 pathways✓
B)Increased efficiency in electron transport
C)Enhanced production rates of NADPH
D)Optimized carbon fixation by C4
💡 Explanation
C3 plants under high O₂ environment undergo photorespiration; rubisco fixes O₂ instead of CO₂. This diversion inhibits the Calvin cycle because it depletes RuBP meant for carbon fixation, therefore reducing the efficiency of the C3 pathway, rather than enhancing it under oxygen-poor conditions.
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