What are the three main types of lipids?

The three main types of lipids are fats, phospholipids, and steroids, which are essential components of biological membranes and play crucial roles in energy storage, cellular structure, and signaling. Fats, also known as triglycerides, serve as a major form of energy storage in the body and are composed of glycerol and fatty acids. Phospholipids are a key component of cell membranes, where they form a bilayer that helps maintain the integrity of cells and control the movement of substances in and out of the cell. Steroids, which include hormones such as testosterone and estrogen, have important regulatory roles in various biological processes.

Each type of lipid has unique structures and functions that contribute to the overall function of living organisms, making this trio foundational to understanding lipid biology. Other options do not correctly categorize the primary types of lipids, as they include substances that are not classified as lipids or mix categories of biomolecules.