Topic one: the central dogma: molecules of life: proteins, carbohydrates, lipids, nucleic acids, all organs in your body involve biochemical reactions. Biochemistry is looking at these reactions at the cellular level; he study of the molecules of life: dogma: an established belief or doctrine: it is authoritative and not to be disputed, central dogma: doubted or diverged from. Rna is translated into a specific protein: genotype: the sum of inheritable potential, phenotype: the sum of observable characteristics, genotype leads to phenotype. Also contain an r group which differentiates them from one another. L-form of the amino acid is what is found in the protein. Four classes of amino acids: polar positive, negative, neutral. Non polar: central carbon is known as the alpha carbon, polar amino acids are hydrophilic. Non-polar are hydrophobic: 20 amino acids exist. R group is a h: proline: unique for having r group connected to the amino group.