Which of the following is NOT a function of the cell membrane?

The cell membrane, often referred to as the plasma membrane, has several essential functions vital for the cell's survival and operation. One of its primary roles is to regulate what enters and exits the cell, allowing it to maintain homeostasis by controlling the movement of substances. It also provides structural support, helping to keep the cell's shape and integrity while protecting its internal components.

Moreover, the membrane plays a critical role in facilitating cell communication through receptor proteins that help detect and respond to signaling molecules. However, synthesizing proteins is not a function of the cell membrane. Protein synthesis actually occurs primarily on ribosomes, which can be found free-floating in the cytoplasm or bound to the endoplasmic reticulum, a distinct cellular structure. Therefore, the statement regarding synthesizing proteins correctly identifies an activity that is not associated with the functions of the cell membrane.