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← ScienceWhich consequence results when magnesium ions deplete in chloroplasts?
A)Reduced grana stacking efficiency✓
B)Increased RuBisCO catalytic activity
C)Enhanced electron transport chain function
D)Decreased thylakoid membrane permeability
💡 Explanation
Reduced grana stacking impairs photosynthesis, because charge screening is diminished by the loss of ionic bonds during magnesium depletion. Therefore grana membranes repel rather than aggregate, because of the reduction in the electrostatic buffering effect.
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