Glycerol is one of the building blocks in lipids.

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Glycerol is one of the building blocks in
lipids. It is a 3C alcohol.
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The second structural unit is fatty acids. The
all have a carboxylic acid group and a variable R
group containing C and H.
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Triglycerides are formed by condensation
reactions between a glycerol and 3 fatty
acids. These reactions form ester
bonds. Triglycerides are not polymers.
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Phospholipids are structurally different to
triglycerides and have different biological
functions. They have 2 fatty acid chains attached
to glycerol. They have an inorganic phosphate
group attached to glycerol in place of the third
fatty acid chain.
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