00:01
Which of these best describes the role of the transport protein in facilitated diffusion? a, they provide the energy for diffusion.
00:09
B, they organise phospholipids to let the solute through.
00:14
C, they provide a protein site for atp hydrolysis.
00:19
D, they allow solutes to move passively down their concentration gradients.
00:24
Or e, they provide a low -resistance channel for water molecules.
00:29
Okay, so first, first of all, facilitated diffusion, like all diffusion, is a passive process.
00:36
So anything to do with using energy is going to be wrong.
00:39
So a is wrong, there's no energy required for diffusion, and c is also wrong.
00:45
We don't need atp hydrolysis because we don't need energy.
00:50
And again, like all diffusion, it will be from the high concentration to low concentration.
00:58
So down each concentration gradient...