Bio - Lipids 0.0 / 5 ? BiologyBiological moleculesASAQA Created by: KTPLCreated on: 20-11-16 14:02 What are the elements that make a lipid? Carbon, Hydrogen, Oxygen (CHO) 1 of 13 Are lipids polar or non-polar, and soluble or insoluble in water? non-polar, insoluble 2 of 13 The two important groups of lipids? Triglycerides and phospholipids 3 of 13 What are triglycerides made of? 1 Glycerol molecule, 3 fatty acid molecules 4 of 13 How many hydroxyl groups (OH-) does glycerol have? 3 5 of 13 What is saturated? All single bonds between carbon atoms 6 of 13 What is unsaturated? At least 1 double bond between carbon atoms 7 of 13 Type of reaction to form a triglyceride? What does this form alongside? Condensation, 3 water molecules 8 of 13 Biological roles of triglycerides? Energy storage, Protection, Insulation (electrical/heat) 9 of 13 What are phospholipids composed of? A polar (hydrophilic) head; A non-polar (hydrophobic) tail 10 of 13 What is the polar head of a phospholipid made of? glycerol and phosphate 11 of 13 What is the non-polar tail of a phospholipid made of? fatty acids 12 of 13 What is the test for lipids? ETHANOL EMULSION TEST: 1. add ethanol. 2. Shake to dissolve lipid. 3. Add water and shale gently. 4. Milky white colour = lipid 13 of 13
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