B1.1.9

• A triglyceride is made by combining three fatty acids with one glycerol.
• Each fatty acid is linked to the glycerol by a condensation reaction -> three water molecules are produced
• The linkage formed between each fatty acid and the glycerol is an ester bond.
• Triglycerides are entirely hydrophobic because the only hydrophilic parts of the two molecules are used up in the condensation reaction.
• Phospholipids have two fatty acids linked to glycerol, with a phosphate group instead of a third fatty acid.
• Phospholipids are partly hydrophilic and hydrophobic because the phosphate is hydrophilic and the fatty acid tails are hydrophobic.
• Phospholipids have the Same structure as triglycerides except that one of the fatty acids is replaced by a phosphate group.