What type of macromolecules includes fats, oils, and waxes?

Fats, oils, and waxes are classified as lipids due to their structure and function. Lipids are hydrophobic (water-repelling) macromolecules that are primarily made up of long hydrocarbon chains. This characteristic is crucial because it allows them to store energy efficiently and perform a variety of biological functions, such as forming cell membranes, serving as signaling molecules, and acting as insulators.

Additionally, lipids are distinguished from other macromolecules by their solubility properties; they do not dissolve in water but can dissolve in non-polar solvents. This differentiates them from proteins, carbohydrates, and vitamins, which either have different structures, functions, or solubility characteristics. Understanding the role of lipids in biological systems is fundamental to studying cellular functions and energy storage.