AP BIOLOGY

Detailed explanation-1: -Active transport uses energy to transport molecules across the plasma membrane. This uses energy from ATP. They also use pumps to get molecules in or out of the cell.

Detailed explanation-2: -To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells.

Detailed explanation-3: -Active transport mechanisms require the use of the cell’s energy, usually in the form of adenosine triphosphate (ATP).

Detailed explanation-4: -Active transport requires energy for the process by transporting molecules against a concentration or electrochemical gradient.