Lipids Exam Questions

Question 1

Describe how you would test for the presence of a lipid in a liquid sample of food. (2)

Answer 1

Add ethanol/alcohol then add water and shake/mix

White/milky (emulsion)

Question 2

Describe how a triglyceride molecule is formed. (3)

Answer 2

One glycerol and three fatty acids

Condensation (reactions) and removal of three molecules of water

Ester bond(s) (formed)

Question 3

Describe how an ester bond is formed in a phospholipid molecule (2)

Answer 3

Condensation (reaction)

Between of glycerol and fatty acid