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Lipids
Contain three main elements: Carbon, Hydrogen and Oxygen

Consist of two types of molecules: Glycerol and Fatty Acids

FUNCTIONS OF A LIPID:

-Energy source, can be respired to make ATP and energy storage, stored in adipose
cells

-Biological membranes are made from lipids

-Insulation, such as blubber in whales,…

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- Healthier

- tend to be oils as more fluid




TRIGLYCERIDE
-Glycerol + 3 Fatty acid chains

-Three `ester links' (link between fatty acid
and glycerol) are formed and new molecule is a
monoglyceride.

-can be saturated or unsaturated

-Hydrophobic (insoluble), so charge
distributed evenly around molecule and thus
does…

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Cholesterol 4 Carbon based Small, thin molecule Form steroid
rings joined that fits in the hormones
together phospholipid bilayer
­ gives strength and
stability

-

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