Lipids

Question 1

Describe how triglycerides are formed.

Answer 1

• one glycerol and three fatty acids
• condensation reaction and the removal of three water molecules
• ester bonds formed

Question 2

Describe how you would test for the presence of lipid in a liquid sample of food.

Answer 2

• Add ethanol and shake
• add water
• white, milky emulsion forms

Question 3

What is an unsaturated fatty acid?

Answer 3

When there is a carbon double bond between adjacent carbon atoms in the hydrocarbon