The cellular membrane consists of a bilayer of which substances?

Nucleic acids, such as DNA and RNA, serve as the genetic material in cells and are involved in the storage and transmission of genetic information. They do not constitute structural components of the cellular membrane; rather, they are found in the nucleus and cytoplasm of cells, playing roles in heredity and protein synthesis.

While proteins are integral to the function of cellular membranes, acting as receptors, channels, and enzymes, they do not form the bilayer structure itself. Instead, membrane proteins are embedded within or associated with the phospholipid bilayer, contributing to various functions such as transport and signal transduction.

Carbohydrates are primarily involved in cell recognition and signaling and are often found attached to proteins and lipids on the extracellular surface of the membrane. However, they do not contribute to the formation of the bilayer structure, which is exclusively made of phospholipids.