Lipids

Question 1

What are the 2 types of lipids?

Answer 1

Phospholipids
Triglycerides

Question 2

What forms a triglyceride?

Answer 2

Glycerol + 3 fatty acids.
Condensation reaction.
Ester bonds.

Question 3

What forms a phospholipid?

Answer 3

Glycerol + 2 fatty acids + phosphate.
Ester bonds.

Question 4

How are phospholipids polar?

Answer 4

Hydrophobic tail.
Hydrophillic head.

Question 5

What are cis fatty acids?

Answer 5

They have H atoms on the same side of the double bond. Therefore easily metabolised.

Question 6

What are trans fatty acids?

Answer 6

H atoms on opposite sides of the double bond. Therefore not metabolised.

Question 7

Properties of triglycerides.

Answer 7

Low mass to energy ratio. (More energy in small volume)
Large, non polar, insoluble.
High ratio of H to O. (Release water when oxidised)
High ratio of energy storing bonds.

Question 8

What are the 5 things lipids used for?

Answer 8

Cell membranes.
Water proofing.
Energy release.
Insulation.
Protection.