1.5 Flashcards
What happens when lipids are oxidised in the respiration process?
bonds are broken and CO2 and H20 are produced
What type of reaction occurs when ester bonds form?
condensation reaction
How many fatty acids are necessary to form a triglyceride?
3
What are the molecules found in triglycerides?
A glycerol molecule, and 3 fatty acids
What lipids store 3 times as much energy as the same mass of carbohydrates?
triglycerides
What are the 2 important groups of lipids?
Fats and Oils
What is the main difference between carbohydrates and lipids element composition?
Lipids contain much lower proportion of Oxygen atoms than carbohydrates
What 2 types of organic chemical substances compose lipids ?
Fatty acids and Glycerol
How are fatty acids and glycerol molecules combined?
By ester bonds
What is Glycerol chemical formula?
C3H8O3
In which 2 ways can fatty acids vary?
- Length of carbon chain (often 15-17 carbon atoms long)
2. Could be saturated of unsaturated
What is the difference between monounsaturated fatty acids and polyunsaturated fatty acids?
Monounsaturated contain only one carbon-carbon double bonds, while polyunsaturated contain more than one carbon-carbon double bonds
Which 2 groups are necessary to form an ester bond and name where they come from.
Carboxyl group from the fatty acid.
Hydroxile group from the glycerol.
State 2 or more diferences in between a saturated/unsaturated fatty acids.
Saturated fatty acids: -every carbon atom fully bonded -linear formation.
Unsaturated fatty acids: -have 1 or more carbon-carbon double bond. -bends/kinks on carbon-carbon double bond.
State the properties of a saturated/unsaturated fatty acid.
Saturated: -solid at room temperature -high meltingp point -linear formation
Unstaturated: -liquid at room temperature -lower melting point than saturated -they bend or kink at every carbon-carbon double bond
