Lipids

Question 1

A group of molecules that are insoluble in water.

Answer 1

Lipids

Question 2

A high proportion of nonpolar C – H bonds causes the molecule to be …….

Answer 2

Hydrophobic

Question 3

What are the 3 main categories of the lipids?

Answer 3

Neutral fats (triglycerides)
Phospholipids
Steroids

Question 4

What composes triglycerides?

Answer 4

1 glycerol + 3 fatty acids

Question 5

Long hydrocarbon chains

Answer 5

Fatty acids

Question 6

Fatty acids may be.. (3)

Answer 6

Saturated
Unsaturated
Polyunsaturated

Question 7

Excellent for energy storage

Answer 7

Triglycerides

Question 8

Animals fats are… fats.

Answer 8

Saturated

Question 9

Plants fats are… fats.

Answer 9

Unsaturated

Question 10

What composes the phospholipids?

Answer 10

1 glycerol
2 fatty acids
phosphate group

Question 11

Phospholipids contain _____ heads and _____ tails. They are amphipathic.

Answer 11

Polar heads

Nonpolar tails

Question 12

They spontaneously form micelles or lipid bilayers due to amphipathic nature. (bases of biological membranes)

Answer 12

Phospholipids

Question 13

4 fused rings

Answer 13

Steroids

Question 14

Functions of steroids (2).

Answer 14

Chemical signalling (hormones).
Offer integrity to plasma membrane structure