Chapter 5 part 2_Spr11 - Lipids(Chapter 5(Chapter 7 pages...

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Lipids (Chapter 5 pages 74 – 77) (Chapter 7 pages 125-128)
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Lipids Substances of biological origin that are soluble in non-polar solvents and essentially insoluble in water!
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Triacylglycerols Pho s pho lipids C ho le s te ro l S phing o lipids TYPES OF LIPIDS
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Triacylglycerols (Triglycerides/neutral fats) (a) Saturated fat and fatty acid Stearic acid Figure 5.12 (b) Unsaturated fat and fatty acid cis double bond causes bending Oleic acid Figure 5.12 MOST ABUNDANT CLASS OF LIPIDS IN ANIMALS
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Fig. 5-11a Fatty acid (palmitic acid) (a) Dehydration reaction in the synthesis of a fat Glycerol HOW IS A FAT MOLECULE SYNTHESIZED?
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Fig. 5-11b (b) Fat molecule (triacylglycerol) Ester linkage
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Fatty acids present in Fats Fatty acids differ in: A) The  le ng th o f C  s ke le to n B) Pre s e nc e  o r abs e nc e  o f do uble  bo nds If no  do uble  bo nds : s aturate d If do uble  bo nd/s  pre s e nt: uns aturate d
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Fatty ac ids  are  lo ng  c hains  o f hydro c arbo ns  e nding  in  - C O O H A)
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B)
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Two isomers of unsaturated fatty acids
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If o nly o ne  do uble  bo nd pre s e nt: Mo no uns aturate d fatty ac id If m o re  than o ne  do uble  bo nd pre s e nt: Po lyuns aturate d fatty ac id
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Fig. 5-12a
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