Lipids

Question 1

Are lipids soluble or insoluble in water?

Answer 1

Insoluble

Question 2

Do lipids provide more or less energy than carbohydrates?

Answer 2

Twice as much energy!

Question 3

Lipids provide 3 important things to cell membranes. What are they?

Answer 3

1. Protection
2. Insulation
3. Hormones

Question 4

What are the 4 groups of lipids? (Hint: TPSW)

Answer 4

1. Triglycerides
2. Phospholipids
3. Sterols
4. Waxes

Question 5

Triglycerides contain 2 things. What are they?

Answer 5

Fats
Oils

Question 6

Triglycerides are composed of how many glycerol and how many fatty acids? (Hint - TRI)

Answer 6

1 glycerol and 3 fatty acids

Question 7

How many glycerol and fatty acids are phospholipids composed of?

Answer 7

1 glycerol
2 fatty acids

Question 8

Sterols are a type of lipid. They contain LDL and HDL cholesterol. Which one is good, which is bad and why?

Answer 8

LDL - bad. Carries cholesterol from liver to the body (arteries block)

HDL - good. Carries cholesterol away from arteries to the liver for storage.

Question 9

Cholesterol is a type of Sterol. What’s it used to make?

Answer 9

Testosterone
Estrogen
Vitamin D
Bile

Question 10

Waxes are a type of lipid. Give example in nature or in body.

Answer 10

Protective coating on leaves
Ear wax to protect ear drum