Lipids are fats (solid at room temperature – from animals) and oils (liquid at room temperature – from plants). Next time you are in the supermarket, notice how many different types of fats and oils you can buy, from butter and lard to olive oil and sunflower oil. Triglycerides, cholesterol and phospholipids are all examples of this class of macromolecules, which are characterised by long carbon chains and being organic molecules, insoluble in water.

• Definition of Lipids
• The Lipids (animation) from WiscOnline
• “For the Love of Lipids” from The PenguinProf
• Condensation to form a triglyceride (animation from iBiology)