What Components of Membranes are the Most Abundant

Question

What components of membranes are the most abundant?  
A) Carbohydrates
B) Sterols
C) Proteins
D) Fats
E) Phospholipids

Accepted Answer

Phospholipids are the most abundant component of membranes, making up the majority of the lipid bilayer. While proteins are also abundant and serve important functions such as transportation and communication, they are not the most abundant component. Carbohydrates are present on the surface of some membranes but are not a major component of the structure. Sterols and fats are present in some membranes but are not as abundant as phospholipids.