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Limited Passage of Small Polar Molecules
Grade Level
AP Biology
APB.135 Limited Passage of Small Polar Molecules
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Aquaporins are added to a protein-free membrane. How should this affect a comparison of water, sucrose, and Na+?
A
Sucrose permeability increases because aquaporins carry large sugars.
B
All three become equally permeable because one protein disrupts the entire bilayer.
C
Na+ permeability increases because aquaporins neutralize ionic charge.
D
Water permeability increases, while sucrose and Na+ remain low unless their own transport proteins are present.
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