Question

In cell biology, how does active transport take place? and how does passive transport take place? what are differences?

Answer 1

Active transport requires energy. It is most commonly accomplished by having a transport protein which changes shape when it binds with the cell’s “fuel,” a molecule called ATP.

Passive Transport (or Diffusion) moves ions from high concentration to low, using no metabolic energy. 
Active Transport moves ions from low concentration to high, using metabolic energy in the form of ATP.