Lipids and Ester Bonds

Question 1

What are Lipids? Properties? Types? Functions?

Answer 1

• C H and O (less O than carbs)
• Non polar and hydrophobic (insoluble in water)
• Triglycerides (main component for fats and oils) and phospholipids
• They play a role in energy storage, insulation, hormonal communication and energy yield

Question 2

What are triglycerides? Properties, composition

Answer 2

Properties
- Non polar, hydrophobic
- Saturated or Unsaturated

Structure
- Glycerol and fatty acids
- Methyl group, then R group chain, then carboxyl group
- RCOOH

Question 3

What are phospholipids?

Answer 3

• 2 fatty acids and 1 phosphate group bonded to 1 glycerol molecule
• Polar due to phosphate group
• Amphipathic (hydrophilic and hydrophobic)

Question 4

Esterification

Answer 4

• Formation of ester bonds
• Forms triglycerides
• When OH (glycerol) bonds with COOH (fatty acid)
• Condensation reaction