Difference between revisions of "Starch"
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:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Starch, pages 176, 185, GCSE Chemistry, Pearson, Edexcel ''] | :[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Starch, pages 176, 185, GCSE Chemistry, Pearson, 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 ''Starch, pages 39, 41, 44, GCSE Biology, 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 ''Starch, pages 39, 41, 44, GCSE Biology, CGP, Edexcel ''] | ||
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| + | :[https://www.amazon.co.uk/gp/product/1782945660/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945660&linkCode=as2&tag=nrjc-21&linkId=83aa4500ad7759e7f401a1c5ba5df758 ''Starch (testing for), page 24, Gateway GCSE Biology; The Revision Guide, CGP, OCR ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/0198359810/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359810&linkCode=as2&tag=nrjc-21&linkId=d768d99f1a06f7c12fab40e5aef85a55 ''Starch, pages 38, 48-49, 252, 256, Gateway GCSE Biology, Oxford, OCR ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Starch, pages 65, 245, Gateway GCSE Chemistry, Oxford, OCR ''] | ||
Latest revision as of 12:12, 20 December 2019
Contents
Key Stage 3
Meaning
Starch is a complex carbohydrate found in food.
About Starch
- Starch is made of many glucose molecules bonded together.
- Starch is an important part of a balanced diet.
Starch Molecule
 |
| A starch molecule made of many smaller glucose molecules. |
Starch in Foods
 |
 |
 |
 |
| Bread makes part of a balanced diet because it has a lot of starch used for energy. | A balanced diet might contain pasta as it is mostly starch. | Potatoes are full of starch. | Rice is mostly starch with very few other nutrients. |
Testing for Starch
- Starch can be detected using Iodine Solution.
Method
- 1. A small sample of food is placed on a spotting tile.
- 2. A drop of Iodine Solution is added to the food sample.
- 3. If the Iodine Solution turns from orange to blue-black then the food contains starch.
 |
| Iodine Solution is an orange liquid. When the Iodine Solution is added to starch the Iodine Solution turns from orange to blue-black. |
Key Stage 4
Meaning
Starch is a polysaccharide found in food.
About Starch
- Starch is a polymer made of many glucose monomers which join together in a polymerisation reaction.
- Starch is an important part of a balanced diet.
- Starch can be broken down into shorter chains by amylase.
Starch Molecule
|
| A starch molecule made of many smaller glucose molecules. |
Starch in Foods
|
|
|
|
| Bread makes part of a balanced diet because it has a lot of starch used for energy. | A balanced diet might contain pasta as it is mostly starch. | Potatoes are full of starch. | Rice is mostly starch with very few other nutrients. |
Testing for Starch
- Starch can be detected using Iodine Solution.
Method
- 1. A small sample of food is placed on a spotting tile.
- 2. A drop of Iodine Solution is added to the food sample.
- 3. If the Iodine Solution turns from orange to blue-black then the food contains starch.
|
| Iodine Solution is an orange liquid. When the Iodine Solution is added to starch the Iodine Solution turns from orange to blue-black. |
References
AQA
- Starch, page 147, GCSE Combined Science Trilogy; Biology, CGP, AQA
- Starch, page 161, GCSE Biology, CGP, AQA
- Starch, page 193, GCSE Chemistry, Hodder, AQA
- Starch, page 26, GCSE Combined Science; The Revision Guide, CGP, AQA
- Starch, page 29, GCSE Biology; The Revision Guide, CGP, AQA
- Starch, pages 172-173, GCSE Chemistry; Third Edition, Oxford University Press, AQA
- Starch, pages 226-7, 252, GCSE Chemistry; Student Book, Collins, AQA
- Starch, pages 46, 128-129, GCSE Biology; Third Edition, Oxford University Press, AQA
- Starch, pages 56, 58,69,98-99, 103, GCSE Biology; Student Book, Collins, AQA
- Starch, test for, page 48, GCSE Combined Science Trilogy 1, Hodder, AQA
- Starch; test for, page 28, GCSE Combined Science; The Revision Guide, CGP, AQA
- Starch; test for, page 32, GCSE Biology; The Revision Guide, CGP, AQA
Edexcel
- Starch, page 100, GCSE Chemistry; The Revision Guide, CGP, Edexcel
- Starch, page 124, GCSE Biology, Pearson, Edexcel
- Starch, pages 16, 17, GCSE Combined Science; The Revision Guide, CGP, Edexcel
- Starch, pages 17-19, GCSE Biology; The Revision Guide, CGP, Edexcel
- Starch, pages 176, 185, GCSE Chemistry, Pearson, Edexcel
- Starch, pages 39, 41, 44, GCSE Biology, CGP, Edexcel