Lipids

Question 1

What do all lipids contain?

Answer 1

Hydrocarbons

Question 2

What are the 2 types of lipids?

Answer 2

1. Triglycerides

2. Phospholipds

Question 3

What are triglycerides made from?

Answer 3

1 Glycerol

3 Fatty acids

Question 4

What are the fatty acids made from?

Answer 4

Hydrocarbons

Question 5

What is special about the fatty acid’s tail?

Answer 5

They are hydrophobic (This makes the lipids insoluble in water)

Question 6

What are the 2 types of fatty acids?

Answer 6

1. Saturated

2. Unsaturated

Question 7

What is the difference between saturated and unsaturated fatty acids?

Answer 7

1. Saturated fatty acids DON’T have any double bonds between the carbon atoms.
2. Unsaturated fatty acids HAVE double bonds between their carbon atoms.

Question 8

What reaction forms a triglyceride?

Answer 8

Condensation reaction

Question 9

What bond forms between a fatty acid and a glycerol?

Answer 9

Ester bond

Question 10

What molecule is realeased when the ester bond forms?

Answer 10

Water molecule

Question 11

What type of lipid is found in the cell membrane?

Answer 11

Phospholipid

Question 12

What is a phospholipid made from?

Answer 12

1 Glycerol
2 Fatty aids
1 Phosphate group

Question 13

What is special about the phosphate group?

Answer 13

It is hydrophilic

Question 14

What are the benefits of triglycerides?

Answer 14

1. Used as energey storage molecules

2. They don’t affect water potential (Because theyre insoluble)

Question 15

What is the test for lipids?

Answer 15

The emulsion test

Question 16

How is the emulsion test carried out?

Answer 16

1. Ethanol is added to the sample in a test tube
2. Distilled water is added

The lipids present should turn a milky colour.