| Term | Definition |
| protein | complex organic compound that consisits of amino acids joined by peptide bonds |
| carbohydrate | organic compound originally formed as a product of photosynthesis |
| nucleic acid | a large, complex molecule made up of carbon, hydrogen, oxygen, nitrogen and phosphorous |
| lipid | compound responsible for the storage of energy in organisms as well as for the insulation of organisms |
| amino acid | the building block of proteins that contains 1 amino group (-NH2) and 1 carboxyl group (-COOH) |
| enzyme | protein that act as biological catalyst to speed up chemical reactions |
| channel protein | protein that are found in the cell membranes that aid in transporting molecules in and out of the cell |
| monosaccharide | the simplest carbohydrate or a simple sugar |
| peptide bond | bond that hold amino acids together to form a dipeptide |
| polypeptide | protein that contains many amino acids |
| saturated fatty acid | a lipid when 1 carbon is bonded to another carbon by 1 bond |
| unsaturated fatty acid | a lipid when 1 carbon is bonded to another carbon by more than 1 bond |
| DNA | deoxyribonucleic acid |
| RNA | ribonucleic acid |
| iodine | reagent that will turn dark when add to a starch |
| biuret | substance used to test for protein |
| Sudan III or IV | substances used to test for lipids |