Lipids Flashcards
What are the two main classifications of lipids?
Complex lipids - contain fatty acids. Called storage or membrane lipids
lipids that do not have fatty acids( cholesterol, vitamins and pigments
DEscribe structure if fatty acid
Fatty acids are carboxylic acids with hydrocarbon chains typically containing between 4 to 36 carbons
What group of the carboxyl group exists at pH 7?
Carboylate (-coo-) instead of carboxyl (-COOH)
Saturated fatty acids
hese fatty acids have no double bonds between carbons in the hydrocarbon chain
Monounsaturated fatty acids
These contain one double bond between carbons in the hydrocarbon chain
Polyunsaturated fatty acids:
have more than one double bond in the hydrocarbon chain
Which omega-3 fatty acids can humans not synthesizwe? How do we obtain them?
ALA (alpha-linolenic acid)
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DHA (docosahexaenoic acid)
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EPA (eicosapentaenoic acid). Through diet.
WHich omega-3 fatty acids can we synthesis from a fatty acid?
DHA and EPA can be synthesised by ALA if enough ALA
WHy are omega-3 fatty acids important?
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Optimal dietary ratio of omega-6 to omega-3 fatty acids is 1:1 to 4:1. However, typical Western diets have a ratio closer to 10:1 to 30:1, making omega-3 supplementation important.
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Omega-3 fatty acids support various functions, including cardiovascular health
DOes solubity increase or decrease with increease in fatty acid chain length?
idecrease because more hydrocarbons , whihc are hydrophobic
DOes melting point increase or decrease with increase in chain length?
CHain length increase, melting point increase becasue of more intermolecular forces
Do double bond increase increase or decrease melting point?
Decrease because less intermolcular molecular forms, Formation of kinks that result in less favourable conformations (cis)
DIfference between cis and trans fatty acids
