LIFE SCIENCE

Detailed explanation-1: -The membrane skeleton strengthens the lipid bilayer and endows the membrane with the durability and flexibility to survive in the circulation.

Detailed explanation-2: -The membrane lipid molecules are amphipathic. The most numerous are the phospholipids. When placed in water they assemble spontaneously into bilayers, which form sealed compartments that reseal if torn. There are three major classes of membrane lipid molecules-phospholipids, cholesterol, and glycolipids.

Detailed explanation-3: -Lipid composition determines membrane properties, and cholesterol plays a major role in this determination as it regulates membrane fluidity and permeability as well as induces the formation of coexisting phases and domains in the membrane.