How would you compare and contrast diffusion and active transport?

Hint: The movement of molecules in the plants takes place by the process of diffusion and active transport. The movement of molecules takes place either along the concentration gradient as in diffusion or against the concentration gradient by active transport.

Complete answer:
The molecules move naturally along the concentration gradient that is from the region of higher concentration to the region of lower concentration. This movement does not need energy. The molecules that are small and do not have any charge move freely across the membrane either by diffusion or if they move against the concentration gradient by active transport. The difference between active transport and diffusion are-



Note: The energy required for the active transport is synthesised by the mitochondria. The carrier proteins or the channel proteins required for the active transport are specific for the specific molecules or ions. There are many carrier proteins present in the cell membrane which facilitate active transport of ions.