2.2.3 Biological Molecules Lipids Flashcards
1
Q
What is a lipid?
A
A biological molecule that is only soluble in organic solvents (e.g alcohol)
2
Q
What are the two types of lipids?
A
Saturated
Unsaturated
3
Q
What is the difference between saturated and unsaturated lipids?
A
Saturated - contain 0 carbon carbon double bonds
Found in animals
Unsaturated - contain 1 or more carbon carbon double bonds
Found in plants
Lower melting point
4
Q
What are triglycerides?
A
Lipids made up of one molecule of glycerol and three fatty acids
5
Q
How are fatty acids joined to glycerol molcules?
A
Ester bonds via condensation reactions
6
Q
What is a phospholipid?
A
Triglyceride with two fatty acids and one phosphate group
7
Q
What part of phospholipids are hydrophillic and hydrophobic?
A
Head - Hydrophilic
Tail - Hydrophobic
