Biological Molecules- Lipids

Question 1

Lipids

Answer 1

Lipids are

Question 2

Main functions of lipids

Answer 2

Energy storage- very good stores of energy in animals and plant seeds, as they are insoluble and will no be moved out of their the cell easily
Thermal insulation- this is due to fats being slow conductors of heat; they help retain body heat in animals
Waterproofing- since the hydrophobic fatty acids repel water, lipids are good at preventing water loss, as seen by plants and insects having a waxy cuticle
Buoyancy- lipids are less dense than water, making aquatic animals more buoyant (able to float)
Cell membrane- the hydrophilic and hydrophobic regions help maintain the bilayer of the membrane

Question 4

Triglycerides

Answer 4

Fat

Question 5

Main groups of lipids

Answer 5

1. Triglycerides (fat and oils )

2. Phospholipids (a special type of lipid)

Question 6

Saturated fat

Answer 6

H

Question 7

Phospholipids

Answer 7

Speacial

Question 8

Diagrams

Answer 8

Diagrams

Question 9

Unsaturated fat

Answer 9

L