alleryStart learning →What are aquaporins?
APumps that expel water using ATP energy
BCarrier proteins that bind and release water
CPeripheral proteins that store water at the surface
DChannel proteins that pass water very rapidly
Answer & Solution
Correct answer: D. Channel proteins that pass water very rapidly
1. Aquaporins are channel proteins.
2. They allow water to pass through the membrane at a very high rate.
3. Being channels rather than pumps, they need no ATP and simply provide an open hydrated route.
4. Aquaporins play a large role in osmosis, most prominently in red blood cells and the membranes of kidney tubules.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 5 "Structure and Function of Plasma Membranes", section 5.2 Passive Transport_
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