Lipids

  • Created by: s180091
  • Created on: 03-10-18 14:39
Are lipids insoluble?
Yes, in water. No, in organic solvents.
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What 3 elements do lipids contain?
Carbon, hydrogen and oxygen.
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Name 7 functions of lipids:
Storage for energy, insulation, protection of organs, buoyancy, water proofing, membranes and steroid hormones.
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What enzyme breaks down lipids?
Lipase
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Name 2 types of lipids:
Triglycerides and phospholipids.
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What is a triglyceride made up of?
Glycerol and 3 fatty acids.
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What bond joins the fatty acids to the glycerol?
An ester bond.
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What is the difference between oil and fat?
Oil is a liquid at room temp and fat is a solid.
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What is meant by the term 'saturated fatty acid'?
A fatty acid with no double carbon carbon bonds. They form straight chains.
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What is meant by the term 'unsaturated fatty acid'?
A fatty acid with at least 1 carbon carbon double bond. If there is more than 1 double CC bond then it is known as a poly-unsaturate. They form kinked chains, the more double CC bonds, the more kinks.
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Which is healthier, a saturated or an unsaturated fatty acid? Why?
Unsaturated because the kinks in their chains mean that they cannot pack together tightly. This makes them less dense than saturated fatty acids.
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What is a phospholipid made up of?
Glycerol, two fatty acids and a phosphate group.
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Which parts of a phospholipid are hydrophobic?
The fatty acid tails
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Which part of a phospholipid is hydrophillic?
The head
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Name 2 waterproof waxes:
Lignin and suberin
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Other cards in this set

Card 2

Front

What 3 elements do lipids contain?

Back

Carbon, hydrogen and oxygen.

Card 3

Front

Name 7 functions of lipids:

Back

Preview of the front of card 3

Card 4

Front

What enzyme breaks down lipids?

Back

Preview of the front of card 4

Card 5

Front

Name 2 types of lipids:

Back

Preview of the front of card 5
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