618/5000 All cells, whether bacteria, archaea or eukaryotes are bounded by membranes. Biological membranes are composed mainly of structured lipids in two facing monolayers, so they are also called lipid bilayers. The membrane, in addition to defining both cellular and organ limits and establishing a barrier to the traffic of molecules from one compartment to another, has other important functions for cell survival, such as selective transport, energy production required for catalytic processes and signal transduction.... [Leer más...]