BIOL 1010U Lecture Notes - Lecture 5: Aminoacyl Trna Synthetase, Hydrogen Bond, Messenger Rna
Document Summary
Biology lecture 5: chapter 4 proteins and translation. There are 20 amino acids distinguished by: being basic or acidic, being polar or nonpolar, being hydrophilic or hydrophobic. All life shares these similar amino acids share common ancestry. Membranes have proteins in them associated in the lipid portion. If an amino acid is charged, it can bond with ions and water. Can have 1000 amino acids strung together. Will continue with peptide chains until desired amino acid is reached. Have a standard structure for all amino acids. Alpha carbon (4 electrons in outer shell) Amino group (nh+) forming covalent bonds within the molecule. Carboxyl group (cooh-) (cid:498)r(cid:499) group which states what amino acid it is. (can be a simple functional group, it is another proton) The corners of this structure form a tetrahedral shape around the alpha carbon. Monomers held together by covalent bonds gives a strong skeleton to the molecule.