Proteins

• What is the structure of an amino acid?

  H - N - H

  |

  R - C - H

  |

  O = C - O - H
• What are the bonds between amino acids?

  Peptide bonds
• How is a peptide bond formed?

  Condensation reaction
• What is the primary structure of a protein?

  The sequence of amino acids
• What is the secondary structure of a protein?

  The polypeptide chain folds into alpha helixes and beta sheets

  Weak hydrogen bonds are formed
• What is the tertiary structure of a protein?

  Maintained by disulphide bridges, ionic bonds, and hydrogen bonds
• What is the quarternary structure of a protein?

  Arrangement of multiple protein subunits to form a functional protein complex
• How do we test for proteins?

  Add biuret solution to a test tube with food sample

  If positive turned purple