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==Key Stage 3==
===Meaning===
An [[enzyme]] is a biological [[molecule]] which can speed up a [[Chemical Reaction|reaction]] or break down large [[molecule]]s into smaller ones.
===About Enzymes===
: [[Organism]]s have a number of different [[enzyme]]s that control the [[Chemical Reaction|chemical reactions]] that take place inside the [[cytoplasm]].
: [[Digestive Enzyme|Digestive '''enzymes''']] are used to break down large [[insoluble]] food [[molecule]]s into small [[soluble]] [[molecule]]s.
: The [[chemical]]s that an [[enzyme]] affects are called [[Substrate (Biology)|substrates]].
: [[Enzyme]]s have an area called an [[Active Site|active site]] which is where the [[enzyme]] interacts with the [[Substrate (Biology)|substrate]].
: The [[Active Site|active site]] is shaped to fit with only one [[Substrate (Biology)|substrate]] so [[enzyme]]s all have specific roles in an [[organism]].
{| class="wikitable"
|-
|[[File:EnzymeDiagram.png|center|400px]]
|-
| style="height:20px; width:200px; text-align:center;" |This [[diagram]] shows an [[enzyme]], [[Substrate (Biology)|substrate]] and the [[Active Site|active site]] of the [[enzyme]].
|}
==Key Stage 4==
===Meaning===
: [[Digestive Enzyme|Digestive '''enzymes''']] are used to break down large insoluble food [[molecule]]s into small [[soluble]] [[molecule]]s.
: The [[chemical]]s that an [[enzyme]] affects are called [[Substrate (Biology)|substrates]].
: [[Enzyme]]s have an area called an [[Active Site|active site]] which is where the [[enzyme]] interacts with the [[Substrate (Biology)|substrate]].: The [[Active Site|active site]] is shaped to fit with only one [[Substrate (Biology)|substrate]] so [[enzyme]]s all have specific roles in an [[organism]].: The fact that certain [[enzyme]]s only work on certain [[Substrate (Biology)|substrates]] is explained by the [[Lock and Key Model]].
{| class="wikitable"
|-
===Denaturation===
: [[Enzyme]]s can be [[denature]]d if the [[temperature]]s are too high or the [[pH]] is too extreme. Different [[enzyme]]s have a different [[Optimum|optimum]] [[temperature]] and [[Optimum|optimum]] [[pH]].
: When an [[enzyme]] is [[denature]]d it changes shape so that the [[Substrate (Biology)|substrate]] will no longer fit the [[Active Site|active site]].
{| class="wikitable"
|-
|[[File:DenaturedEnzyme.png|center|400px]]
|-
| style="height:20px; width:200px; text-align:center;" |This [[diagram]] shows an [[enzyme]] before and after [[denature|denaturation]].
|}
===pH and Enzymes===
|}
: If the [[temperature]] goes above 45 all of the [[enzyme]]s will be [[denature]]d.
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Enzyme, pages 207, 243, 253, GCSE Chemistry; Student Book, Collins, 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=27ad53b0283feeff7fc5ae04a9e205f266 ''Enzyme, pages 64, 86-7, 96-103, 109, 170, 190, 246, 346-9, GCSE Biology; Student Book, Collins, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Enzymes, page 154, GCSE Chemistry, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/1782946381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946381&linkCode=as2&tag=nrjc-21&linkId=5ec5fc3f6429e30c1d9ab9bca2bccf93 ''Enzymes, pages 109-111, 114-116, GCSE Combined Science Trilogy; Biology, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945954/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945954&linkCode=as2&tag=nrjc-21&linkId=100574c08fbbb64318256eb79ed61a76 ''Enzymes, pages 115- 117, 120-122, GCSE Biology, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Enzymes, pages 125, GCSE Combined Science Trilogy 2, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe09915 ''Enzymes, pages 25-27, GCSE Combined Science; The Revision Guide, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Enzymes, pages 28-31, GCSE Biology; The Revision Guide, CGP, 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 ''Enzymes, pages 38-39, 42-49, GCSE Biology; Third Edition, Oxford University Press, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851338/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851338&linkCode=as2&tag=nrjc-21&linkId=425855d5890466e47189e1c21b67a1ea ''Enzymes, pages 43, 45-50, 65, 125-6, GCSE Biology, Hodder, AQA '']
====Edexcel====
:[https://www.amazon.co.uk/gp/product/1782948147/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948147&linkCode=as2&tag=nrjc-21&linkId=f63dcd8345f4e49c717b39a228a36c7c ''Enzymes, page 239, GCSE Chemistry, CGP, 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 ''Enzymes, pages 143, 176, GCSE Chemistry, 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 ''Enzymes, pages 15-17, 133, GCSE Combined Science; The Revision Guide, CGP, 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 ''Enzymes, pages 16-18, 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 ''Enzymes, pages 36-42, GCSE Biology, 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 ''Enzymes, pages 8, 12-13, 257, GCSE Combined Science, Pearson Edexcel '']
:[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 ''Enzymes, pages 8, 12-13, GCSE Biology, Pearson, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782945725/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945725&linkCode=as2&tag=nrjc-21&linkId=694be7494de75af3349537d34e13f7f0 ''Enzymes, pages 82, 103, GCSE Chemistry; The Revision Guide, CGP, Edexcel '']
:[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 ''Enzymes; action, pages 18-19, GCSE Biology, Pearson, Edexcel '']
:[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 ''Enzymes; activity, pages 20-21, GCSE Biology, 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 ''Enzymes; denaturing, page 143, GCSE Chemistry, Pearson, 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 ''Enzymes; denaturing, page 257, 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 ''Enzymes; investigating activity, page 17, 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 ''Enzymes; investigating activity, pages 39, 40, GCSE Biology, CGP, Edexcel '']
====OCR====
:[https://www.amazon.co.uk/gp/product/1782945679/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945679&linkCode=as2&tag=nrjc-21&linkId=a2db42f7b4bdf10cafaafa3bb9120940 ''Enzymes, page 72, Gateway GCSE Chemistry; The Revision Guide, CGP, OCR '']
:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Enzymes, pages 15-17, 133, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']
:[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 ''Enzymes, pages 17-19, Gateway GCSE Biology; The Revision Guide, CGP, 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 ''Enzymes, pages 183, 204, Gateway GCSE Chemistry, Oxford, 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 ''Enzymes, pages 32-35, 38, 144, 256-257, Gateway GCSE Biology, Oxford, OCR '']
:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Enzymes; factors affecting enzymes, pages 15, 16, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']
:[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 ''Enzymes; factors affecting, page 18, Gateway GCSE Biology; The Revision Guide, CGP, OCR '']
:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Enzymes; investigating activity of, page 17, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']
:[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 ''Enzymes; investigating activity, page 19, Gateway GCSE Biology; The Revision Guide, CGP, OCR '']