1. Lipids

2. Aims o Elements of lipids o Structure of glycerol & fatty acids o Condensation reactions to form triglycerides o Phospholipids

3. Biological Molecules http://www.bozemans cience.com/042- biologoical-molecules

4. What does this have to do with lipids? How does the hump help the camel survive? What is the related biochemical reaction?

5. Introduction to lipids o Lipids contain the elements carbon, hydrogen and oxygen. o They have numerous functions, primarily energy stores in animals and plants. o Lipids consist of two types of molecules - glycerol & fatty acids.

6. Glycerol o A molecule of glycerol is made up of three carbon atoms. o Each of these has a hydroxyl group attached to it. o Hydrogen atoms occupy the remaining positions.

7. Fatty Acids

8. A single fatty acid molecule contains an acid (COOH) group attached to a hydrocarbon chain. Hydrocarbon usually denoted by the letter ’R’. Saturated = If every carbon atom in the chain is joined by a single C-C bond. Unsaturated = at least one C=C bond. Polyunsaturated = many double bonds. Most animal fats are saturated while most plant fats are unsaturated.

9. Triglycerides

10. o A triglyceride molecule is made of a glycerol molecule and three fatty acids. o The molecules join together through the process of condensation losing a molecule of water each time a link is made. o The link between the glycerol molecule & each fatty acid is an ‘Ester Link’. o The fatty acids in a lipid molecule can differ in length and can be saturated or unsaturated.

11. Triglycerides

12. Condensation

13. Phospholipids o In phospholipids one of the fatty acids of a triglyceride is substituted by a phosphate group.

14. Phospholipids

15. Formation of a phospholipid

16. Lipids & water o Triglycerides and phospholipids have hydrophobic and hydrophilic groups. oWhat does this mean? oTo what use is this feature put in biology? oWhat happens when you mix oil in water? Describe and explain.

17. Cholesterol

18. Steroids e.g. testosterone

19. Makes notes on cholesterol and steroids o Draw and compare them (find the relevant challenge question on the challenge board in S8)

20. Lipid Links o To make further notes on Lipids : owww.mrothery.co.ukwww.mrothery.co.uk oThe Biology Corner www.biologycorner.com/ Offers profound resources of tutorials and lesson plans for biology and science teachers. Devoted to the compilation of interactive education sites.

21. Interactive games o https://quizlet.com/8237101/scatter https://quizlet.com/8237101/scatter o https://quizlet.com/92891012/scatter https://quizlet.com/92891012/scatter o https://quizlet.com/13324550/scatter https://quizlet.com/13324550/scatter