Active transport: Active transport is the movement of molecules or ions against the concentration gradient, i.e. the molecules or ions from the region of low Concentration towards the region of high concentration. The movement of molecules can be compared with ...

Passive transport: Passive transport is a type of diffusion in which ions and particles or molecules of various substances move through the plasma membrane from a region of higher to lower concentration by diffusion. How is the transport of molecules ...

Plasma Membrane: The plasma membrane, cell membrane, cytoplasmic membrane and permeable membrane collectively these are same membrane which surround the cell and the components of cell. Every living cell is externally covered by a thin transparent, electron microscopic, plastic, regenerative ...

Introduction Cell theory is the scientific theory of the unit of living world. Now a days it is universally accepted that all living organisms are made up of single unit called cell. So the cell is structural and functional unit ...