Cell membranes have distinct inside and outside faces. Which of the following statements is the most plausible explanation for the asymmetrical nature of the two layers of the membrane?
A) Cell membranes form a border between adjacent cells in tightly packed tissues such as epithelium.
B) Cell membranes communicate signals between different cell types.
C) The two layers of a cell membrane face different environments and carry out different functions.
D) Proteins only function on the cytoplasmic side of the cell membrane.

Question

Quizplus · Accepted Answer

The asymmetry of the cell membrane is due to the fact that the two layers face different environments (the extracellular space and the cytoplasm) and have different functions, such as transport, signal reception, and cell recognition. This functional and environmental difference necessitates different compositions and structures for each layer.

Cell Membranes Have Distinct Inside and Outside Faces