Lipids

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Which 3 elements do lipids contain?
Carbon, Hydrogen and Oxygen
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Are lipids soluble or insoluble in water?
Insoluble
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What are the main group of lipids?
Triglycerides
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What is the main role for lipids?
Used in plasma membranes
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What is the role of lipids as an energy source?
When oxidised they provide more energy than carbohydrates
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What is the role of lipids in waterproofing?
They are insoluble in water and therfore useful in waterproofing eg.waxy cuticles on leaves
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What is the role of lipids in insulation?
Fats are slow conductors of heat when stored beneath the body surface, they help to retain heat
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What is the role of lipids in protection?
Fats are often stored around delicate organs
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How do monosaturated and polyunsaturated differ?
Monosaturated has one double bond between carbons and Polyunsaturated has many
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How are phospholipids similar to lipids?
They are similar except that one fatty acid molecule is replaced by a phosphate molecule
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What part of a phospholipid interacts with water?
Hydrophillic head
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What part of a phospholipd interacts with fat?
Hydrophobic tail
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What bond joins the fatty acid tail to the head?
Hydrogen bond
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What is the test for lipids?
Emulsion test
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What is a positive result of the emulsion test?
Cloudy precipitate
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What two arrangements can phosphlipids form?
Micelle and Bilayer
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Card 2

Front

Are lipids soluble or insoluble in water?

Back

Insoluble

Card 3

Front

What are the main group of lipids?

Back

Preview of the front of card 3

Card 4

Front

What is the main role for lipids?

Back

Preview of the front of card 4

Card 5

Front

What is the role of lipids as an energy source?

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