(a) Intracellular organelles that are engaged in degradative chemical reactions are limited by membranes.-Localization of function.
(b) On their outer surface, cells of multicellular organisms carry specific glycoproteins that are responsible for cell-cell adhesion- intercellular communication.
(c) The interior of a membrane consists primarily of the hydrophobic portions of phospholipids and amphipathic proteins. -regulation of transport.
(d) Cellular membranes have a two-layered structure with hydrophobic tails facing each other.-permeability barrier
(e) All of the acid phosphatase in a mammalian cell is found within the lysosomes. -localization of function.
(f) The membrane of a plant root cell has an ion pump that exchanges phosphate inward for bicarbonate outward.-regulation of transport.
(g) Ions and large polar molecules cannot cross the membrane without the aid of a transport protein. -permeability barrier.
(h) Insulin does not enter a target cell but instead binds to a specific membrane receptor on the external surface of the membrane, thereby activating the enzyme adenyl cyclase on the inner membrane surface.-Detection of signal.
Explanation:
Biological membranes are dynamic, fluid structure that form a boundary around cell organelles and cell.They are made up of lipids and proteins. They have several functions such as restricting function, localization, communication etc,
