Lipids

Question 1

What is a triglyceride made of?

Answer 1

Glycerol (alcohol)

3 fatty acids (hydrocarbons)

Question 2

What reaction joins glycerol and fatty acids together?

Answer 2

Condensation reaction

Question 3

What bond is formed between glycerol and a fatty acid?

Answer 3

Ester bond

Question 4

What’s the ‘basic unit’ of lipids?

Answer 4

Triglyceride

Question 5

Do lipids contain more/less oxygen than hydrogen atoms?

Answer 5

Less oxygen atoms, more hydrogen atoms

Question 6

What are the hydrogen atoms in lipids involved in? What does it produce?

Answer 6

Aerobic respiration, producing ATP

Question 7

What are the two types of fatty acids? Give an example of each

Answer 7

Saturated - animal fats

Unsaturated - oil

Question 8

What bonds do saturated/unsaturated fats contain? What do they do to the molecule?

Answer 8

Saturated - single bonds, meaning it has the max no. of H atoms
Unsaturated - double bonds, reducing the amount of H atoms and produces a bend giving it a low melting point

Question 9

Why do we need lipids? (5)

Answer 9

Secondary energy reserve 
Insulation
Protection of delicate organs 
Buoyancy 
Call membrane