AP BIOLOGY

Detailed explanation-1: -Lipids. Lipids are a hydrophobic set of macromolecules, i.e., they do not dissolve in water. These involve triglycerides, carotenoids, phospholipids, and steroids. They help in the formation of the cell membrane, formation of hormones and in the and as stored fuel.

Detailed explanation-2: -Lipids are large macromolecules that do not dissolve in water. Because they do not dissolve in water, lipids protect cells. Lipids are also a large part of the cell membrane. Lipids store energy for cells and help with cell communication.

Detailed explanation-3: -Fats, oils, and waxes are all examples of lipids. There are lots of lipids, but they all share the trait of being at least partially hydrophobic (meaning they won’t mix with water). Water molecules are polar because they have positive and negative ends, rather like little magnets.

Detailed explanation-4: -As alluded to above, lipids are a class of naturally occurring molecules that are soluble in nonpolar organic solvents, and are not soluble in water.

Detailed explanation-5: -Lipids are a large and diverse class of biological molecules marked by their being hydrophobic, or unable to dissolve in water. The hydrophobic nature of lipids stems from the many nonpolar covalent bonds. Water, on the other hand, has polar covalent bonds and mixes well only with other polar or charged compounds.