Which of the Following Mechanisms is Responsible for the Selectivity

Question

Which of the following mechanisms is responsible for the selectivity of aquaporins for water?
A) Size exclusion
B) Electrostatic repulsion
C) Dynamic hydrogen bonding
D) Prevention of ion gradient formation
E) All of the above

Accepted Answer

Aquaporins are water-selective channels that facilitate the transport of water across cell membranes. The selectivity of aquaporins for water is due to a combination of mechanisms, including size exclusion, electrostatic repulsion, dynamic hydrogen bonding, and prevention of ion gradient formation.