Which of the following macromolecules includes fats, waxes, steroids, and oils?

The correct answer is the category of macromolecules known as lipids. Lipids are a diverse group of hydrophobic organic compounds that include fats, waxes, steroids, and oils. They are characterized by their solubility properties, mainly being insoluble in water due to their long hydrocarbon chains or rings, which makes them crucial in forming cell membranes, serving as energy reserves, and acting as signaling molecules in biological systems.

Fats, which are a type of lipid, are composed of glycerol and fatty acids, providing energy storage for organisms. Waxes serve protective functions, forming waterproof coatings on plant leaves and animal fur. Steroids, with their four interconnected carbon rings, play important roles in cellular functions and hormone regulation. Oils, typically liquid at room temperature, are another form of fats that also serve as energy sources and have various industrial applications.

The other macromolecules mentioned are distinct from lipids. Proteins are composed of amino acids and are primarily involved in structure, function, and regulation of the body's tissues and organs. Nucleic acids, such as DNA and RNA, carry genetic information and are critical in biological inheritance. Carbohydrates provide a primary energy source and are composed of sugar molecules. Each of these mac