State two process necessary condition for active transport to occur ??

1. Active transport requires the use of energy in the form of ATP (adenosine triphosphate) to move molecules or ions against their concentration gradient.
2. Active transport also requires the presence of specific carrier proteins embedded in the cell membrane that facilitate the movement of molecules or ions across the membrane.

1. Binding of the molecule to be transported to a specific transport protein
2. Input of energy, usually in the form of ATP hydrolysis