Which group of organic molecules includes fats, oils, and waxes?

Lipids are a diverse group of organic molecules that are primarily characterized by their hydrophobic nature, meaning they do not dissolve in water. This group includes fats, oils, and waxes, which are important for various biological functions. Fats and oils serve as energy storage molecules, providing a dense source of energy for organisms. Waxes, found in substances like plant cuticles and some animal coatings, play a crucial role in protecting organisms from water loss and environmental damage.

Lipids are distinguished from other organic molecule groups due to their unique chemical structure. They are typically composed of long hydrocarbon chains or rings and include triglycerides, phospholipids, and steroids, among others. Their ability to form membranes, store energy, and serve as signaling molecules is fundamental to cellular function and overall organismal health.

In contrast to proteins, nucleic acids, and carbohydrates, which serve distinct roles such as structural components, genetic information storage, and energy provision, lipids have a primary role in energy storage, insulation, and cellular membrane formation, making them essential to life.