- #1
STAii
- 333
- 1
Greetings.
According to my textbook (again, this might not be really accurate because of translation):
If proteins are just molecules (big ones i guess), how do they 'know' what the cell needs at a certain time (to let it into the cell) ?
Thanks in advance.
According to my textbook (again, this might not be really accurate because of translation):
Now, here is my question :Transport proteins in the plasma membrane are selective in the ions/molecules/atoms that it let to pass through it, and this happens according to the need of the cell.
IOW, if the cell needs a certain ion/molecule/atom that has a higher concentration inside the cell than outside it, this ion/molecule/atom will be transported from the the outside to the inside through a transport protein, and this process needs energy on the shape of ATP.
If proteins are just molecules (big ones i guess), how do they 'know' what the cell needs at a certain time (to let it into the cell) ?
Thanks in advance.