Biological Membranes Composition of cellular membranes and their chemical structures--structural basis of its biological functions Membrane proteins-cell adhesion endocytosis, fusion during viral infection Protein-mediated passage of solutes via transporters and ion channelsBiological Membranes Composition of cellular membranes and their chemical structures—structural basis of its biological functions Membrane proteins—cell adhesion, endocytosis, fusion during viral infection Protein-mediated passage of solutes via transporters and ion channels