Answer:
The use of proteins in a cell membrane to move molecule from a low concentration on one side to a high concentration on the other is done by membrane transport proteins (Carrier proteins)
Explanation:
Carrier- mediated transport can be described as a type of transport in which carrier molecules assist in the movement of molecules inside or outside the cell.
There are two types of membrane transport proteins:
Channel proteins can be described as proteins which open channels in the cell membrane. Molecules tend to move along the concentration gradient i.e from a higher concentration to a lower concentration through this phenomenon.
Carrier proteins can be described as proteins which open in one direction only. The facilitate the movement of molecules against the concentration gradient i.e from a lower concentration to a higher concentration.
