allery**Aquaporins** are:
AWater-tight membrane proteins
BMembrane channel proteins that facilitate rapid passive water transport across cell membranes
CWater-storing tissues in succulents
DActive ATP-driven water pumps
Answer & Solution
Correct answer: B. Membrane channel proteins that facilitate rapid passive water transport across cell membranes
Aquaporins (AQPs) are integral membrane channels that allow facilitated diffusion of water (and sometimes small solutes) through bilayers ~10×–100× faster than simple diffusion.
Important in roots (water uptake) and guard cells (stomatal movement).
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