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← Nature & AnimalsWhich outcome during phosphorus starvation triggers nitrogen fixation enzymes?
A)Downregulation ribosomal RNA transcription✓
B)Enhanced root hydraulic conductivity
C)Increased leaf stomatal conductance
D)Upregulation of glycolysis enzymes
💡 Explanation
Phosphorus starvation reduces available ATP, leading to downregulation of ribosome synthesis using nitrogen; because nitrogen demand for new ribosomes declines, nitrogen fixation upregulates to utilize excess, producing ammonia rather than lacking usable forms. Downregulation prevents resource waste, therefore benefiting the whole cell.
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