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Enzyme actionWALT: To be able to describe how enzymes work.WILF: ~ Recall what the word denatured means. (D)~ Describe how factors (temperature, pH and concentration) can affect the activity of enzymes. (C)~ Explain the model of the ‘Lock and Key’ hypothesis of showing how enzymes work. (B)~ Explain how enzymes work referring to the active site and how it can be affected . (A/A*)
Keywordsenzyme active site Lock and Key
hypothesis substrate
Substrate molecules
EnzymeActive site
Product
The ‘lock and key’ hypothesis
Reaction happens (bonds either made or broken)
Enzymes have a specific 3D structure
Enzyme-substrate complex
Breaker Enzymes
Enzymes
Builder Enzymes
Enzymes
The ‘lock and key’ hypothesisTask: Copy this
image, label and add notes to explain how the ‘lock and key’ hypothesis works.Keywords
enzyme substrate active site 3D shape specific reaction product
A change in temperature or pH can affect the bonds that hold the protein together. This causes the enzyme to denature, loose its shape.
The ‘lock and key’ hypothesis
Factors which affect enzyme reactions
Use information on pg 54 to make notes on how each factor affects the rate of reaction.
Enzyme triominoes 1.Cut out all
your triangle pieces.
2.Match up a question with an ANSWER.
3.Create 3 of your own question and answers.
4.Glue into your books.
You should end up with a triangle shape like
the one above.
The ‘lock and key’ hypothesis
Copy and label the diagram from the board and then use the keywords to fill in the gaps.
Enzymes have a ________________ 3d shape.
The molecules that enzymes work on are called ____________. This molecule fits into the enzymes ____________ _________, this is a different shape in each type of enzyme.
The reaction takes place, this could involve ________ being made or broken. After the reaction the ____________ is released.
The ‘lock and key’ hypothesis
Copy and label the diagram from the board and then use the keywords to fill in the gaps.
Enzymes have a ________________ 3d shape.
The molecules that enzymes work on are called ____________. This molecule fits into the enzymes ____________ _________, this is a different shape in each type of enzyme.
The reaction takes place, this could involve ________ being made or broken. After the reaction the ____________ is released.
The ‘lock and key’ hypothesis
Copy and label the diagram from the board and then use the keywords to fill in the gaps.
Enzymes have a ________________ 3d shape.
The molecules that enzymes work on are called ____________. This molecule fits into the enzymes ____________ _________, this is a different shape in each type of enzyme.
The reaction takes place, this could involve ________ being made or broken. After the reaction the ____________ is released.
The ‘lock and key’ hypothesis
Copy and label the diagram from the board and then use the keywords to fill in the gaps.
Enzymes have a ________________ 3d shape.
The molecules that enzymes work on are called ____________. This molecule fits into the enzymes ____________ _________, this is a different shape in each type of enzyme.
The reaction takes place, this could involve ________ being made or broken. After the reaction the ____________ is released.