Final answer:
Cell membranes have multiple functions, such as defining boundaries, regulating transport, and facilitating communication, but do not serve as a store of information, which is found within the nucleus or nucleoid.
Step-by-step explanation:
The cell membrane is essential for a variety of functions that help maintain the cell's homeostasis and integrity. The primary functions of the cell membrane include defining cell and organelle boundaries, regulating the transport of substances, facilitating cell-cell communication, and providing sites for specific biochemical functions. However, information storage is not a function of cell membranes as the storage of genetic information is mainly contained within the nucleus of eukaryotic cells and in the nucleoid region in prokaryotic cells.
Cell membranes are composed of a phospholipid bilayer, proteins, and various other molecules that contribute to its dynamic nature. The selective permeability allows for the regulation of substances entering and exiting the cell, maintaining an optimal internal environment. Furthermore, the cell membrane's surface markers play a pivotal role in cell recognition during developmental processes and immune response.
Of the options provided, the function that does not apply to cell membranes is information storage. Cells store their hereditary information in the form of DNA within the nucleus or nucleoid, not within the cell membrane.