In what way do the membranes of a eukaryotic cell vary? in what way do the membranes of a eukaryotic cell vary? certain proteins are unique to each membrane. only certain membranes are constructed from amphipathic molecules. only certain membranes of the cell are selectively permeable. some membranes have hydrophobic surfaces exposed to the cytoplasm, whileothers have hydrophilic surfaces facing the cytoplasm. phospholipids are found only in certain membranes.