What causes carrier proteins to change shape ?
Do they need energy to change shape? If that is true, how are they involved in Facilitated diffusion ?
By changing shape, do we always mean opens from one side and closes from another ? (they all work by changing shape right ?)
once they transport a molecule from inside to outside, do they return to their original shape instantly or do they need to transport a substance from inside to the outside to return to their original shape ?
and finally, are all co-transport proteins carrier proteins ?