AP BIOLOGY

Detailed explanation-1: -The fundamental building blocks of all cell membranes are phospholipids, which are amphipathic molecules, consisting of two hydrophobic fatty acid chains linked to a phosphate-containing hydrophilic head group (see Figure 2.7).

Detailed explanation-2: -The most abundant membrane lipids are the phospholipids. These have a polar head group and two hydrophobic hydrocarbon tails. The tails are usually fatty acids, and they can differ in length (they normally contain between 14 and 24 carbon atoms).

Detailed explanation-3: -Complete answer: The key ingredients of a cell membrane are phospholipids, proteins, and carbohydrate groups which help to form the cell membrane. Membranes are represented as a fluid lipid bilayer with floating proteins and carbohydrates in the Fluid Mosaic Model.

Detailed explanation-4: -The cell membrane is made mostly of lipids, a group of macromolecules made of hydrocarbon chains, such as fats, sterols, and waxes. Lipids function to form membranes inside cells and to store energy. The most common lipid in the cell membrane are phospholipids.

Detailed explanation-5: -Most plasma membranes consist of approximately 50% lipid and 50% protein by weight, with the carbohydrate portions of glycolipids and glycoproteins constituting 5 to 10% of the membrane mass.