Lipids

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  • Created by: Alice
  • Created on: 12-01-14 15:10
What three elements are lipids made from?
Carbon, Hydrogen, and Oxygen.
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Are lipids soluble or insoluble in water?
Insoluble.
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What solvents are lipids soluble in?
Alcohol and acetone.
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What are the three main groups of lipids?
Triglycerides, phospholipids, and waxes.
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Lipids have five functions. What are they?
1. Plasma membranes. 2. Energy source. 3. Insulation. 4. Protecting organs. 5. Waterproofing.
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How do three fatty acids and glycerol form a triglyceride?
By a condensation reaction. Forms a triglyceride with three molecules of water.
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What makes a lipid saturated?
No carbon-carbon double bonds. All carbon atoms are saturated with hydrogen atoms.
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What is the difference between mono-unsaturated and polyunsaturated lipids?
Mono-unsaturated has a single double bond. Polyunsaturated has more than 1 double bond.
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Discuss phospholipid structure.
They are similar to lipids, but have 2 fatty acids and a phosphate molecule.
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Why are phosphate molecules different to fatty acid molecules in terms of attraction?
Whereas fatty acids are hydrophobic and repel water, phosphate molecules attract water (hydrophilic!)
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There are two parts to a phospholipid. Name them.
Hydrophilic head which interacts with water and not fat. Hydrophobic tail which orients away from water and mixes with fat.
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What do we call a molecule with two differently-behaved ends?
Polar
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Other cards in this set

Card 2

Front

Are lipids soluble or insoluble in water?

Back

Insoluble.

Card 3

Front

What solvents are lipids soluble in?

Back

Preview of the front of card 3

Card 4

Front

What are the three main groups of lipids?

Back

Preview of the front of card 4

Card 5

Front

Lipids have five functions. What are they?

Back

Preview of the front of card 5
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