1. M OLECULES OF L IFE Macromolecules

2. What is a molecule?molecule Two or more atoms covalently bonded together. Examples: H2O, CO2, CH4 What is a macromolecule? A very large molecule made of MANY atoms covalently bonded together. Examples: DNA, Sugar, Fat What is an organic molecule?organic molecule A molecule that contains carbon (with the exception of carbon dioxide). What is a monomer? A single molecule that repeats to make a large molecule. What is a polymer? A large molecule made of chains of smaller molecules.

3. C ARBOHYDRATES StructureFunctionExamplesFoods Hydrogens: Oxygens (___:___) Monomer: Monosaccharide Polymer: Polysaccharide Energy Source Short term Long term Glucose Starch Table sugar Pasta; Potatoes

6. L IPIDS (F ATS ) StructureFunctionExamplesFoods Glycerol backbone with fatty acid chains attached Monomer: Fatty Acid Polymer: Lipid or Fat Energy Storage Membrane Structure Steroids  Saturated  solid  Unsaturated  liquid  cell membranes  Testosterone butter oils

7. Saturated Fat (solid at room temp) Single Bonds Between Carbons Unsaturated Fat (liquid at room temp) Some carbons double bonded

9. Friday, November 7, 2008 Question of the Day List one difference between a carbohydrate and a lipid?

10. P ROTEINS StructureFunctionExamplesFoods Long chains of amino acids 20 kinds of amino acids Monomer: Amino Acid Polymer: Protein Do the work in your body.  speed up reactions  Structural (building) enzymes collagen  meat  cheese  Eggs  yogurt

11. N UCLEIC A CIDS StructureFunctionExamples Nucleic AcidsStore Genetic Information DNA

13. Carbohydrate (monosaccharide) Lipid (Fatty Acid) Protein (Amino Acid) Brainstorm Inside of each shape provide the following: 2 Foods you eat that contain that molecule. 2 Ways that your body uses those molecules. 2 Facts about the structure (shape) of that molecule.