| A | B |
| Nucleic Acid | macromolecule containing hydrogen, oxygen, nitrogen, carbon and phosphorus used most importantly for information in the cell |
| Deoxyribonucleic Acid (DNA) | nucleic acid that contains the sugar deoxyribose |
| Ribonucleic Acid (RNA) | nucleic acid that contains the sugar ribose |
| Nucleotide | monomer of nucleic acids made up of a 5-carbon sugar, phosphate group and a nitrogenous base |
| Protein | macromolecule that contains carbon, hydrogen, oxygen and nitrogen; needed by the body for growth and repair and to make up enzymes |
| Amino Acid | compound with an amino group on one end an a carboxyl group on the other end, the monomer for proteins |
| Enzyme | a protein that is a catalyst |
| Catalyst | substance that speeds up the rate of a chemical reaction |
| Substrate | the reactant in an enzyme catalyzed reaction |
| Product | element or compound produced by a chemical reaction |
| Lock and Key Model | The idea that an enzyme can only fit one type of substrate molecule, the shape of one matches the other |
| Active Site | the location on the enzyme were the reactant or substrate fits |
| Activation Energy | the amount of energy needed to get a reaction started |
| Denature | When a protein loses its shape due to a change in pH or temperature |