EVERYDAY SCIENCE

Detailed explanation-1: -Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.

Detailed explanation-2: -Active transport requires energy. It could be compared to a ball moving up a hill. Active transport is the transport of molecules that require the use of energy, in the form of an energy-storing chemical called ATP (adenosine triphosphate) to help them cross the cell membrane.

Detailed explanation-3: -In active transport, substances move against a concentration gradient across a cell membrane. Hence energy is required. The energy available in the body in the form of ATP is used to move this substance across the cell membrane.

Detailed explanation-4: -Answer and Explanation: In cell biology, active transport is considered an energy-dependent transport process that requires energy input for rapid ions movement across the plasma membrane to maintain the electrochemical gradient.

Detailed explanation-5: -Primary active transport directly uses a source of chemical energy (e.g., ATP) to move molecules across a membrane against their gradient.