1. Objective: What is the importance of Lipids and Proteins? Take out your notecards Do Now: Simple carbohydrates are also known as …..

2. Macromolecule #2: Lipids Fats, oils and waxes are the most common. Contain 1. Carbon 2. Hydrogen 3. Oxygen Used for –Long term energy storage Found in animals such as whales or seals for insulation. Wax found in plants is to prevent water loss (known as cuticle). Steroids –4 ringed carbon structure –estrogen, testosterone –Cholesterol is found in the membrane of cells

3. Macromolecule #3: Proteins Protein: a polymer made of monomers called amino acids.

4. 3 parts of an amino acid Amino group Carboxyl Group R group Gives the amino acid specific characteristics

5. Proteins used for –Muscles, hair, structural parts of cells, cartilage and bone, enzymes, hormones

6. Nucleic Acids DNA: dexoyribonucleic acid RNA: ribonucleic acid Carry genetic info DNA makes up chromosomes Macromolecu les #4 Nucleic Acids

7. Chemical reaction Chemical Reactions occur when bonds are broken and atoms are rearranged C 6 H 12 O 6 + 6O 2  6H 2 O + CO 2 + ENERGY Reactant  Product

8. Chemical Reactions In order for a reaction to occur an input of ENERGY is required (activation energy).

9. But chemical reactions can be sped up An example is… ENZYMES –SPEED UP CHEMICAL REACTIONS. –PROTEINS THAT BIND TO REACTANT AND LOWER ACTIVATION ENERGY. EXAMPLES: –LACTASE: breaks down lactose –CATALASE: break down the hydrogen peroxide produced in liver cells.