Each of the following is a function of membranes except sites for specific biochemical functions regulation of transport. cell - cell communication. information storage. defining cell and organelle boundaries. Solution Biological membranes serve as defining boundaries of the cells and membrane bound cell organelles. They also serve in transport of selected substaces through them and thereby maintain the cell\'s interior. They serve as site for complex reactions and are central to cell cell communication. However, storage of information is the function of nucelus which houses the genetic material. Correct answer is D..