Does active transport require ATP?

Yes, active transport can only be achieved with the help of ATP or Adenosine Triphosphate.

Active transport refers to the movement of molecules from an area of lower concentration to an area of higher concentration. This movement against the concentration gradient cannot be achieved without some type of energy. The energy required for this process is supplied by ATP, a high-energy molecule that is generated through cellular metabolism. The process is called active transport because it requires energy to facilitate the movement of molecules.

This is different from passive transport, in which molecules move naturally along the concentration gradient, from an area of high concentration to an area of low concentration.