Lipids

Question 1

What are the properties of lipids in gener?

Answer 1

Insoluble in water.
Hydrophobic region
Soluble in organic solvents such as ethanol

Question 2

What is a triglyceride?

Answer 2

The most common type of lipid

Question 3

What is the function of a triglyceride?

Answer 3

Energy storage
Protection of delicate organs such as the kidney.
Insulation as it reduces heat loss

Question 4

Where are lipids stored?

Answer 4

In adipose tissue which is made up of fat cells

Question 5

When are lipids called fats and oils?

Answer 5

They are called fats when lipids are solid but called oils when lipids are liquid.

Question 6

What is the function of fatty acids?

Answer 6

Fatty acids are broken down by the body for use in plasma membrane of cells

Question 7

What are the 3 types of fatty acids and what bonds do they have?

Answer 7

Saturated fatty acids only have single bonds.
Monounsaturated fatty acids have only one double bond.
Polyunsaturated fatty acids have many double bonds.

Question 8

Describe the properties of saturated fatty vids?

Answer 8

Single bonds form a straight chain.
Straight chains line against each other.
Attractions form between all molecules and require energy to overcome the attraction.
Therefore they have high melting point and are solids at room temperatures.