Molecules- Lipids

Question 1

3 facts about lipids

Answer 1

-they are insoluble in water
-they contain carbon, hydrogen and oxygen.
-the 2 main types for us are triglycerides and phospholipids

Question 2

What is the role of phospholipids in the body

Answer 2

they provide flexibility and transfer of lipid soluble substances across the membrane

Question 3

How do lipids create insulation in the body

Answer 3

Slow conductors of heat so storage under the skin helps retain body heat and provide electrical insulation as myelin

Question 4

How do lipids create protection in the body

Answer 4

Fat that is stored around the body

Question 5

What is an ester bond

Answer 5

A bond in a triglyceride where each fatty acid bonds with glycerol a condensation reaction and three molecules of water

Question 6

What are phospholipids made of

Answer 6

One molecule of glycerol, two fatty acid chains and one phosphate molecule

Question 7

State two functions of lipids in the body

Answer 7

Protection and insulation
Fat protects some organs in the body

Question 8

What is the key different between a phospholipid and a triglyceride in terms of structure

Answer 8

Phospholipids are a sphere with a hydrophilic head and hydrophobic tails. Triglycerides are E shaped with 3 fatty acid chains and one glycerol molecule