Understanding Lipids

Which of the following is NOT a function of lipids?

• Energy storage

• Insulation

• Cell communication

• Protein synthesis

What is the main structural difference between saturated and unsaturated fats?

• Saturated fats have single bonds, unsaturated fats have double bonds.

• Saturated fats are hydrophilic, unsaturated fats are hydrophobic.

• Saturated fats are liquid at room temperature, unsaturated fats are solid.

• Saturated fats have double bonds, unsaturated fats do not.

Why are saturated fats considered less healthy compared to unsaturated fats?

• They are less stable at high temperatures.

• They contain more calories.

• They are more likely to form plaques in blood vessels.

• They are more expensive.

What makes the head of a phospholipid hydrophilic?

• It contains fatty acids.

• It has a positive charge.

• It contains polar bonds and negative charges.

• It is made of hydrocarbons.

How do phospholipids arrange themselves in a cell membrane?

• With hydrophobic tails interacting with water.

• With hydrophilic heads facing the watery environments.

• With hydrophilic heads facing each other.

• With hydrophobic tails facing outward.