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Transport of Ions and Large Polar Molecules
Grade Level
AP Biology
APB.134 Transport of Ions and Large Polar Molecules
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A plant vacuole accumulates sucrose to a concentration higher than the cytosol. Which prediction is most accurate for sucrose entry into the vacuole?
A
Sucrose diffuses through the tonoplast because it is dissolved in water.
B
Sucrose crosses faster when no proteins are present.
C
Sucrose requires a tonoplast transporter, and accumulation against a gradient requires energy coupling.
D
Sucrose enters by the same direct path as carbon dioxide.
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