Lipids

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  • Created by: samya_
  • Created on: 24-12-17 12:47
What are the 2 kinds of lipids needed to know?
*triglycerides *phospholipids
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Draw the structure of a triglyceride molecule?
Draw and check by Look in book
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Draw the basic structure of a fatty acid ?
Draw and check by looking in book
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What are triglycerides formed by
Condensation reaction between a glycerol molecule and fatty acid.....process is 3 times since tri
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In condensation reaction between glycerol and fatty acid what bond is forme d
Ester bond is formed and a molecule of water is released
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Differences between saturated and unsaturated fatty acids
Unsaturated has at least one double bond between carbon atoms *saturated cause increase is LDL's unsaturated Dosent *saturated solid at room temp *unsaturated liquid at room tempo and is veg/plant in origin *saturated is animal in origin
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Difference bwteeen phospholipid and triglyceride
Phospholipid replaces one fatty acid with a phosphate group
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Explain heads and tails?
Tail is hydrophobic so points inwards head is hydrophilic so points outwards
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Structure of phospholipid in relation to function
Head hydrophilic tails hydrophobic thus Phospholipids form a Bilayer within Cell surface Membrane, as result hydrophobic barrier formed in centre (in between) ** structure allows them to from glycolipids by combining with carbohydrates
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What happens when Phospholipids are mixed in water
The hydrophilic heads point outwards whereas the hydrophilic tails point inwards. ***center is hydrophobic therefore water soluble substances cant easily pass through
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What are triglycerides mainly used as
Energy storage molecules
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Structure of triglyceride in relation to function
Long hydrocarbon tails contains lots of chemical energy, thus loads of energy related when they're broken down * good storage molecules as low mass to energy ratio, so much energy to be stored in small volume **non polar molecules *imsolubke in wate
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The 4 roles of lipids
Source of energy, waterproofing was insoluble in water plants and insects have waxy cuticle *insukation, fats are slow conductor of heat and when stored between body surface help retain body heat *protection since fat often stored around delicate org
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Explain emeukitin test for lipids
1) crush/grind piece of food if neeeeded 2) shake gets usbtanace with ethanol for about a minute so that it dissolves, then pour solution into water * any lipid will show as a milky emulsion. WHITE EMULSION SHOWS PRESNECE OF LIPID
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Other cards in this set

Card 2

Front

Draw the structure of a triglyceride molecule?

Back

Draw and check by Look in book

Card 3

Front

Draw the basic structure of a fatty acid ?

Back

Preview of the front of card 3

Card 4

Front

What are triglycerides formed by

Back

Preview of the front of card 4

Card 5

Front

In condensation reaction between glycerol and fatty acid what bond is forme d

Back

Preview of the front of card 5
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