Final answer:
A fatty acid is a hydrocarbon chain bonded to a carboxyl group. Triglycerides are fats made up of three fatty acids bonded to a glycerol molecule. Phospholipids make up cell membranes and have a glycerol backbone, two fatty acid chains, and a phosphate group. Cholesterol is a steroid lipid found in cell membranes and is the precursor for steroid hormones.
Step-by-step explanation:
A fatty acid is a type of macromolecule that consists of a hydrocarbon chain and a carboxyl group. Triglycerides, also known as triacylglycerols or fats, are a type of lipid that are composed of three fatty acids bonded to a glycerol molecule. Phospholipids are another type of lipid that make up the membrane of cells. They have a glycerol backbone, two fatty acid chains, and a phosphate group. Cholesterol is a type of steroid lipid and is a vital component of cell membranes and a precursor for steroid hormones.