Active Transport

Active transport is the movement of molecules and ions against the concentration gradient from an area of low concentration to an area of high concentration.

• The cell has to use energy to transfer these particles against a concentration gradient.
• Energy provided in the form of ATP which is produced from respiration.
• Energy is used to energise the protein carriers.

ATP (Adenose Triphosphate) is released during respiration.

During active transport, ATP is broken down. This process involves the enzyme ATPose which catalyses the reaction by removing a phosphate group to form ADP (Adenosine Diphosphate)

By breaking this bond, energy is released.

As active transport is dependent on a supply of ATP from…