AP BIOLOGY

Detailed explanation-1: -The lipid bilayer of many cell membranes is not composed exclusively of phospholipids, however; it often also contains cholesterol and glycolipids. Eucaryotic plasma membranes contain especially large amounts of cholesterol (Figure 10-10)-up to one molecule for every phospholipid molecule.

Detailed explanation-2: -This fluid lipid bilayer cross section is made up entirely of phosphatidylcholine. The three main structures phospholipids form in solution; the liposome (a closed bilayer), the micelle and the bilayer.

Detailed explanation-3: -The lipid bilayer is a universal component of all cell membranes. Its role is critical because its structural components provide the barrier that marks the boundaries of a cell. The structure is called a “lipid bilayer” because it is composed of two layers of fat cells organized in two sheets.

Detailed explanation-4: -Lipid bilayers The protective membrane around cells contains many components, including cholesterol, proteins, glycolipids, glycerophospholipids, and sphingolipids.

Detailed explanation-5: -A Phospholipid Bilayer The cell membrane is composed mainly of phospholipids, which consist of fatty acids and alcohol. The phospholipids in the cell membrane are arranged in two layers, called a phospholipid bilayer.