1. Turn in your homework if you didn’t finish it during Buff Time yesterday, then complete your bell work. BELL WORK: Copy the bold words in the question below, then write your answer: The cellular process known as the sodium-potassium pump was discovered in the 1950’s by Jens Christian Skou, a Danish scientist. This process is a form of active transport that moves three sodium ions to the outside of a cell for every two potassium ions that it moves into the cell. Explain why energy is needed for active transport.

2. Before we begin… MISSING WORK must be turned in by Friday (homework, bell work, test review). TEST CORRECTIONS must be completed by Thursday (that’s tomorrow, folks!).

3. Set up the next page in your journal… o Page: 21 o Date: 9-23-15 o Title: Lipids o Essential Question: Why are lipids so important? o Yes, Cornell notes! Today we’re burning a candle…wait to find out why!

4. Before we begin…  Glue the picture to the top left corner of your notes.  Under the picture, write FATTY ACID.

5. Lipids….here we go! Structure discovery: How would you describe the structure (shape) of this biomolecule? What elements are present? How do you know for sure that it is not a carbohydrate?

6. Structure: typically chain shaped (there are a few exceptions) contain the elements Carbon, Hydrogen, and Oxygen (CHO) do NOT have a 1:2:1 ratio.

7. Function: Long term energy storage o 9 calories per gram o more bonds = more energy, so they take longer to break apart main component of the cell membrane (remember the lipid bilayer??) waxy coating (cuticle) on leaves hydrophobic (water-fearing) o they don’t dissolve in water! insulate against heat loss

8. Don’t try this at home!!! www.youtube.com/watch?v=JH_op- P1t9E&feature=youtu.be

9. Saturated: all Carbon atoms are bonded to a Hydrogen atom Unsaturated: not all Carbon atoms are bonded to Hydrogen; double bonds present Two Types:

10. Fat Oil Wax Examples:

11. What do we call the pieces of a lipid? Monomer = fatty acid Three fatty acids bond with a glycerol to form a … Polymer = triglyceride glycerol backbone with three fatty acid chains

12. Burning Questions…  At the bottom of your notes, copy and answer the following question: o Why does a candle burn so much longer than a marshmallow? o Use the words sugar, lipid, bonds, and energy in your answer!

13. Foldable Time!!! 1.At the bottom of the Monomer box, add the monomer of a lipid. 2.At the bottom of the Polymer box, add the polymer of a carbohydrate. 3.Draw an arrow from the monomer to the polymer. 4.On the inside of the LIPIDS door, write THREE functions and FIVE examples. 5.On the front of the LIPIDS door, draw a fatty acid. Be sure to draw all the elements!