What are the features of facilitated diffusion?
1) It uses protein channels in the membrane and is driven by the energy from ATP.
2) It moves molecules from regions of higher concentration to lower concentration and is driven by the kinetic energy of the molecules which are diffusing.
3) It uses protein channels in the membrane, and the maximum rate of diffusion depends on the number of these channels.
1 )
1, 2 and 3
2 )
1 and 2 only
3 )
1 and 3 only
2 and 3 only
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