1.2 Lipids Flashcards
1
Q
What are triglycerides made of?
A
One molecule of glycerol and three fatty acids
2
Q
What are the bonds in a triglyceride?
A
Ester bonds
3
Q
What makes a triglyceride saturated?
A
No double bonds between carbons
4
Q
What makes a triglyceride unsaturated?
A
One or more double bond between carbons.
5
Q
Do triglycerides attract or repel water?
A
Repel because fatty acid tails are hydrophobic so they are insoluble and don’t affect the cell’s water potential.
6
Q
What is the structure of a phospholipid?
A
- Glycerol
- Two fatty acid tails
- Phosphate group head
7
Q
Which part of the phospholipid is hydrophobic and which is hydrophilic?
A
Phosphate head = hydrophilic
Fatty acid tails = hydrophobic
8
Q
How to test for lipids?
A
The emulsion test:
- Add ethanol
- Shake
- Add distilled water
- A white milky emulsion if lipid is present
