Lipids

Question 1

What is the function of lipids?

Answer 1

Waxes solid below 45°- water proofing outside layers (skin/leaves)
Energy stores- yields more energy than glucose
Heat insulator
Metabolic water
Protection

Question 2

What do lipids consist of?

Answer 2

Glycerol

Fatty acids

Question 3

Are lipids polar or nonpolar & why?

Answer 3

Non polar

No charge

Question 4

What are the 3 groups of lipids?

Answer 4

Triglycerides
Phospholipids
Steroids

Question 5

What bonds form when glycerol and fatty acids join through a condensation reaction?

Answer 5

Ester bonds

Question 6

What is a triglyceride made up of?

Answer 6

3 fatty acids

Glycerol

Question 7

What’s the difference between saturated and unsaturated fats?

Answer 7

Saturated fats lack double bonds
Saturated have higher melting lint tbsp unsaturated
Saturated fats =solid @ room temp

Question 8

What is a phospholipid

?

Answer 8

A triglyceride with a fatty acid removed & replaced with a phosphate group

Question 9

Is the phosphate group polar or non polar?

Answer 9

Polar

Question 10

Is the phosphate groups hydrophobic or hydrophilic?

Answer 10

Hydrophilic

Question 11

Why is the phospholipid “confused”?

Answer 11

Tails is hydrophobic but phosphate group is hydrophilic