| A | B |
| Organic Compounds | carbon atoms combined with hydrogen and oxygen |
| Carbohydrates | all know types of living cells |
| Carbohydrates contain: | hydrogen and osygen atoms, same ratio as water |
| Lipids | fats and oils |
| Two Primary Functions of Lipids | long term storage of energy and carbon, and building of structural parts of cell membranes |
| Proteins | every cell contains hundreds to thousands |
| enzymes | specialized molecules that facilitate many reactions occuring in cells |
| Amino acids contain: | carbon, hydrogen, oxygen, and nitrogen atoms |
| Peptide Bonds | Covalent bonds, formed between amino acids |
| Polypeptide | long chain of amino acids |
| Chemical Reactions occur: | within a fairly narrow range of temperatures |
| Nucleic acids | macromolecules that dictate the amino acid sequence of proteins |
| RNA | Ribonucleic |
| DNA | deoxyribonucleic |
| Genes | units of genetic information that pass from parent to offspring |
| RNA | contains the sugar ribose instead of deoxyribose |
| Water | Can be a gas, liquid or solid |
| Molecules | made of atoms that have been chemically combined |
| Subscript | number of atoms of each element in a molecule |
| Atoms | built of many smaller molecules |
| Protons and Neutrons | remain in the center, or nucleus, of the atom |
| Chemical Reactions | when 2 or more atoms react to form compounds |
| Chemical Bonds | attraction between oppositely charged ions forms an ionic bond |