Saturated Fats and Unsaturated fats (both fats are long chains of carbon, hydrogen, some oxygen (small amounts)

• A. Lipids
• B. Carbohydrates
• C. Proteins
• D. Nucleic Acids

Answer: (A)

Fats are a type of lipid. Lipids are largely nonpolar and not water-soluble, with long carbon–hydrogen chains and only a small amount of oxygen. The distinction between saturated and unsaturated fats comes from the bonds in those carbon chains: saturated fats have all single bonds, so the chains are straight and tend to pack tightly, making them solid at room temperature. Unsaturated fats have one or more double bonds, which create kinks in the chains and prevent tight packing, so they are usually liquids at room temperature. This classification and these properties help differentiate fats from carbohydrates (sugars and polysaccharides), proteins (amino acids), and nucleic acids (genetic material).