Difference between revisions of "Lipid"
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| style="height:20px; width:400px; text-align:center;" |The mixture on the right shows the presence of [[lipid]]s. | | style="height:20px; width:400px; text-align:center;" |The mixture on the right shows the presence of [[lipid]]s. | ||
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===References=== | ===References=== | ||
====AQA==== | ====AQA==== | ||
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:[https://www.amazon.co.uk/gp/product/0198359373/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359373&linkCode=as2&tag=nrjc-21&linkId=952a73bbb09d222ecc4b50d200679849 ''Lipids, pages 40-41, 129, 162-163, GCSE Biology; Third Edition, Oxford University Press, AQA ''] | :[https://www.amazon.co.uk/gp/product/0198359373/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359373&linkCode=as2&tag=nrjc-21&linkId=952a73bbb09d222ecc4b50d200679849 ''Lipids, pages 40-41, 129, 162-163, GCSE Biology; Third Edition, Oxford University Press, AQA ''] | ||
:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Lipids, test for, page 48, GCSE Combined Science Trilogy 1, Hodder, AQA ''] | :[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Lipids, test for, page 48, GCSE Combined Science Trilogy 1, Hodder, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f290 ''Fat, page 101, 103, GCSE Biology; Student Book, Collins, AQA ''] | ||
| − | === | + | ====Edexcel==== |
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| + | :[https://www.amazon.co.uk/gp/product/1292120207/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120207&linkCode=as2&tag=nrjc-21&linkId=22455ff53961978667722edaa64c0be5 ''Lipids, page 124, GCSE Biology, Pearson, Edexcel ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Lipids, page 17, GCSE Combined Science; The Revision Guide, CGP, Edexcel ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Lipids, page 86, GCSE Combined Science, Pearson Edexcel ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782946748/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946748&linkCode=as2&tag=nrjc-21&linkId=a4f0348fc37d0ba1bb52d27f8679581f ''Lipids, pages 18, 19, GCSE Biology; The Revision Guide, CGP, Edexcel ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782948120/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948120&linkCode=as2&tag=nrjc-21&linkId=dedef775c6a43dbb0a609441525adac0 ''Lipids, pages 42, 45, GCSE Biology, CGP, Edexcel ''] | ||
| − | : | + | ==Beyond the Curriculum== |
| + | {{#ev:youtube|https://www.youtube.com/watch?v=QhUrc4BnPgg}} | ||
Revision as of 14:50, 22 November 2019
Key Stage 3
Meaning
Lipids are molecules found in fats and oils.
About Lipids
- Oil is better for us than fat, but we need some of both.
- If we eat too much fat and oil then we can become obese.
Sources of Lipids
 |
 |
 |
 |
 |
| Meat contains useful fat for our diets, but too much can lead to heart disease. | Fish is a very healthy source of oils in our diet. | Nuts are a healthy source of oils. | Butter is full of fat and we shouldn't eat too much. Butter is found in cakes and cookies. | Cooking oil is used to fry our food causing it to have a lot of oil inside it. A small amount is healthy but too much is bad for us. |
Testing For Lipids
- Adding lipids to paper can turn the paper translucent.
The Paper Test Method
- 1. Take a small sample of food.
- 2. Wipe it on a piece of paper.
- 3. Hold the paper up to the light.
- 4. If the paper has turned translucent the food contained lipids.
 |
| There are two patches where fat has been asborbed by the paper. |
The Alcohol Emulsion Test Method
- 1. Take a small sample of food.
- 2. Place the food in ethanol and mix by shaking or stirring.
- 3. Filter the mixture.
- 4. Add the clear solution to some water.
- 5. If lipids are present then a white emulsion will appear.
 |
| The mixture on the right shows the presence of lipids. |
Key Stage 4
Meaning
Lipids are molecules, made of a glycerol head and 3 fatty acid tails, that is found in fats and oils.
About Lipids
- Lipids are an essential nutrient in our diet that is used in our nervous system.
- Lipids store chemical energy at a higher energy density than carbohydrates so the body stores extra energy in fatty tissue made of lipids.
- If there are too much lipids in our diet then we can become obese.
- Lipids are broken down by our digestive system into a glycerol head and 3 fatty acid tails.
- The fatty acids in lipids can be many different lengths.
 |
| This diagram shows a simple representation of a lipid. |
Sources of Lipids
|
|
|
|
|
| Meat contains useful fat for our diets, but too much can lead to heart disease. | Fish is a very healthy source of oils in our diet. | Nuts are a healthy source of oils. | Butter is full of fat and we shouldn't eat too much. Butter is found in cakes and cookies. | Cooking oil is used to fry our food causing it to have a lot of oil inside it. A small amount is healthy but too much is bad for us. |
Testing For Lipids
- Adding lipids to paper can turn the paper translucent.
The Paper Test Method
- 1. Take a small sample of food.
- 2. Wipe it on a piece of paper.
- 3. Hold the paper up to the light.
- 4. If the paper has turned translucent the food contained lipids.
|
| There are two patches where fat has been asborbed by the paper. |
The Alcohol Emulsion Test Method
- 1. Take a small sample of food.
- 2. Place the food in ethanol and mix by shaking or stirring.
- 3. Filter the mixture.
- 4. Add the clear solution to some water.
- 5. If lipids are present then a white emulsion will appear.
|
| The mixture on the right shows the presence of lipids. |
References
AQA
- Lipids (test for), page 28, GCSE Combined Science; The Revision Guide, CGP, AQA
- Lipids (test for), page 32, GCSE Biology; The Revision Guide, CGP, AQA
- Lipids, pages 40-41, 129, 162-163, GCSE Biology; Third Edition, Oxford University Press, AQA
- Lipids, test for, page 48, GCSE Combined Science Trilogy 1, Hodder, AQA
- Fat, page 101, 103, GCSE Biology; Student Book, Collins, AQA
Edexcel
- Lipids, page 124, GCSE Biology, Pearson, Edexcel
- Lipids, page 17, GCSE Combined Science; The Revision Guide, CGP, Edexcel
- Lipids, page 86, GCSE Combined Science, Pearson Edexcel
- Lipids, pages 18, 19, GCSE Biology; The Revision Guide, CGP, Edexcel
- Lipids, pages 42, 45, GCSE Biology, CGP, Edexcel