1. Carbohydrates: These are made up of sugars and starches, and they provide energy for the body. Examples include glucose, fructose, and cellulose.

2. Lipids: These are fats, oils, and waxes. They store energy, provide insulation, and make up cell membranes. Examples include triglycerides, phospholipids, and cholesterol.

3. Proteins: These are made up of amino acids and are essential for building and repairing tissues, as well as for enzymes, hormones, and antibodies. Examples include collagen, insulin, and hemoglobin.

4. Nucleic Acids: These are made up of nucleotides and are responsible for storing and transmitting genetic information. Examples include DNA and RNA.