Final answer:
Carbohydrates are macromolecules that provide energy and structural support. Lipids are nonpolar and hydrophobic compounds with various functions.
Step-by-step explanation:
Carbohydrates are a group of macromolecules that are a vital energy source for the cell and provide structural support to plant cells, fungi, and arthropods. They are classified as monosaccharides, disaccharides, and polysaccharides. Carbohydrates include common monosaccharides like glucose, galactose, and fructose, as well as disaccharides like lactose, maltose, and sucrose. Starch and glycogen are examples of polysaccharides.
Lipids, on the other hand, are nonpolar and hydrophobic compounds. They include fats and oils, waxes, phospholipids, and steroids. Fats are stored forms of energy, phospholipids make up cell membranes, and steroids, such as cholesterol, have a ring structure and play important roles in the body.