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11 Cards in this Set
- Front
- Back
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What percent of organic matter in a cell is made of lipids? |
5% bitch |
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Roles of a lipid |
In the cell membrane (cell communication) Hormones (insulin) Insulation Protection Energy source/store |
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Structure of lipids |
Consists of glycerol and fatty acid (carboxylic acid) and form an ester bond to form tryglyceride |
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Two types of tryglycerides |
Unsaturated(less hydrogen (alkene) |
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Structure of phospholipids |
Two fatty acids One phosphate group 1 glycerol Hydrophilic head Hydrophobic tail Form a bi layer in water |
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Cholesterol structure |
4 carbon rings 1OH group and a hydrocarbon tail Soluble in water Small (compact) |
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Uses of cholesterol |
Mechanical fluidity of cell membrane Steroid hormons |
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Uses of phospholipids |
Cell membrane Cell signalling |
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Uses of tryglycerides |
Fat-insulation Energy storage |
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How can lipids be bad |
Excess cholesterol can be deposited in blood vessels causing atheroceloris. |
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How does the structure of phospholipids differ from tryglycerides |
Phospholipids have: 1 less fatty acid and therefore one less ester bond They have a phosphate group Hydrophilic head |
