Biochemistry - Lipids Flashcards
1
Q
What are the elements that compose a Lipid?
A
Carbon, Hydrogen, Oxygen (CHO)
2
Q
What are the three types of Lipids?
A
- triglyceride (fats + oils)
- phospholipids
- steroids
3
Q
What is the structure of triglycerides?
A
1 glycerol head and 3 fatty acids
4
Q
What are Lipids good for?
A
- energy storage
- insolation against heat loss
- building blocks and cell membranes
- structure
- protection or major organs
- signalling
5
Q
Why are fats and oils good for energy storage?
A
- efficient cus of high concentration of C-H bonds
- most fats contain more than 40 carbon atoms
- ratio of C-H bonds to C atoms is more than twice that of carbohydrates
6
Q
What are the two types/flavours of fatty acids/triglycerides?
A
saturated and unsaturated.
7
Q
what are two important traits of a saturated fatty acid?
A
- single-bonded carbons only
- solid at room temp
8
Q
What are two important traits of unsaturated fatty acids?
A
- one or more double bonded carbons
- liquid at room temp
9
Q
What type of fat provides more energy?
A
the more highly saturated
10
Q
What do double bonds cause in the fatty acid tails?
A
kinks or bends
11
Q
Do Triglycerides mix with water? Why?
A
No. they are neutral and thus hydrophobic. But will mix with other neutral substances.
