Phospholipids

Question 1

Fatty acids are … (repel water)

Answer 1

hydrophobic

Question 2

Phosphate molecules are … (attract water)

Answer 2

hydrophilic

Question 3

Discuss the bilayer arrangement of molecules.

Answer 3

Both of the insides and the environment outside are watery so phospholipids in cell forms a double layer with a hydrophilic head of the molecule pointing towards outside of the cell and watery area. Hydrophobic tails point into the middle of the membrane.

Question 4

What are waxes?

Answer 4

Glycerol in waxes is replaced by a longer chain alcohol, making them (waxes) more complex structures. Waxes are more solid than fats at room temperature.

Question 5

What is the major role of waxes?

Answer 5

Produce a protective waterproof cuticle on the surfaces of leaves and insects.