It is not a widely used strategy in procaryotes as far as we know. Clicking on the image will show you a movie of what facilitated diffusion looks like. Figure 1 - Facillitated Diffusion. A protein specifically binds the target molecule and during transport a chemical modification takes place. No actual concentration of the transported substance takes place, since as it enters the cell, it is now chemically different.
Most group translocation requires energy.
In active transport the target is not altered and a significant accumulation occurs in the cytoplasm with the inside concentration reaching many times its external concentration. Active transport proteins are molecular pumps that pump their substrates against a concentration gradient. Both pmf and ATP are made by central metabolism and we will cover their formation by the cell later in the semester. Active transport proteins may be highly specific and carry only one molecule or may be more general and carry one class of molecules. The movie of Active Transport shows several different types of transport molecules.