Bell Ringer: 10/6/17 Objective: Identify the presences of lipids and answer questions based on collected data. Question: Identify which of the following are considered organic. H20 Protein Rocks Carbohydrate Lipid CO2 Glucose Fat NH4 SO4 Sulfur O2

Lipid Lab Divide brown paper bag into six equal sections (example on board) In each section rub a small amount of each of the following foods. (If it is a liquid, just add a couple of drops to make a wet spot) Apple Juice Butter Egg Honey Canola Oil One empty section Take a paper towel to rub off any excess food.

Lipids Primary function  store LONG TERM energy Contain C, H, and O Contain more C-H bonds than carbs  better energy source Subunits are… Glycerol (containing a hydroxyl group -OH) Fatty acids (containing a hydrocarbon chain) Combine to form a triglyceride

Types of Lipids Fats Phospholipids Sterols Waxes What do they do?

Functions Long term energy storage Cell Membranes Cushion Organs Insulates Body

Saturated vs. Unsaturated - Most animal fats Solid at room temperature Limit amount in your diet Contributes to heart disease Plants, vegetables, & fish fats Liquid at room temperature Better choice in your diet.

Cholesterol Good molecule in Cell Membranes Make hormones from it Includes sex hormones Too much cholesterol in blood may lead to heart attack

Cell membranes are made out of lipids Phospholipids Tails are on the side away from the water Fear of the water Heads are on the outside near the water Love water Forms a barrier between the cell and outside

Monomer - Triglycerides 3 fatty acids attached to 1 glycerol Triglycerides store twice as much energy as complex carbs Saturated  Single Bond (Solid at room temp) Unsaturated  One of more double bonds (Liquid at room temp) Fatty acid (unsat.) Glycerol Fatty Acid (saturated)

Hydrophobic fatty acid tails Phospholipids Hydrophobic fatty acid tails Phosphate head is hydrophilic (orange area) Main component of cell membranes

Sterols 4 fused carbon rings with functional groups Cholesterol: most common type in animals Functions include: membrane components and hormones (testosterone & estrogen)

Waxes Tightly packed long-chain fatty acids linked to long-chain alcohols or carbon rings All repel water Found on the outer covering of a leaf (cuticle)

Bozeman Lipids Answer Questions Hand in when finished. Work on Flipchart: Lipid Section. May move and work with people. At 10:08 we will finish the lipid lap.

Finish Lipid Lab Write out full question & answer underneath on lined paper. When finished return to your seat with lab for next part of class. Class Set goes back to station #8

Homework Lipid Honors Homework