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← Nature & AnimalsWhich constraint arises when a plant maintains high Rubisco concentrations?
A)Increased photorespiration under high oxygen✓
B)Decreased ATP production in the calvin cycle
C)Reduced starch synthesis during the night
D)Lowered chlorophyll production during daytime
💡 Explanation
Maintaining high Rubisco concentrations elevates oxygen affinity, and the mechanism of photorespiration increases because Rubisco binds to more oxygen. This leads to carbon loss rather than efficient fixation; therefore, photorespiration increases, rather than ATP production falling.
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