Lipids

Question 1

What are the 2 groups of lipids?

Answer 1

Triglycerides and phospholipids

Question 2

What is the structure of a triglyceride?

Answer 2

Contains 1 molecule of glycerol and 3 molecules of fatty acid

Question 3

What kind of bond do lipids have?

Answer 3

Ester bonds

Question 4

What is the difference between a triglyceride and a phospholipid?

Answer 4

In phospholipids, one of the fatty acids is replaced with a phosphate-containing group

Question 5

What is the structure of a phospholipid?

Answer 5

A phospholipid contains hydrophobic tails and hydrophilic heads, which create a double layer

Question 6

What is the test for lipids?

Answer 6

The emulsion test

Question 7

What is the first step in the test for lipids?

Answer 7

Add ethanol to the test substance

Question 8

What is the second step in the test for lipids?

Answer 8

Shake the mixture for 1 minute

Question 9

What is the third step of the test for lipids?

Answer 9

Add water to the solution

Question 10

What is the fourth step of the test for lipids?

Answer 10

Shake again

Question 11

What is the result of the test for lipids?

Answer 11

Milky emulsion means there are lipids