1. Enzyme Foldable What is an Enzyme? Parts of an Enzyme Enzyme Action
Fold your paper and label as follows:
Front
What is an Enzyme?
Parts of an Enzyme
Enzyme Action
Energy Use
Factors that Affect Enzyme Function 1 2 3 4
Back 5

2. 1. What is an Enzyme? Enzymes Define
A protein that acts as a chemical catalyst.
Function
Speeds up chemical reactions using less energy than without the use of an enzyme
Enzymes
What does it look like?
A lock-and key model
Special Feature
There is a specific enzyme for every chemical reaction that takes place within an organism

3. 2. Enzyme Parts Enzyme – protein that acts as a catalyst
Active Site - the specific region of the enzyme which combines with the substrate
Substrate – the “chemical reaction” the enzyme works on
Product – the outcome of the enzyme action

4. 3. Enzyme Action What is an Enzyme Substrate Complex?
In a chemical reaction, the step where a substrate binds to the active site of an enzyme
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5. 4. Energy Use With & Without an Enzyme

6. 5. Factors that Affect an Enzyme
Temperature’s Affect on Enzymes
Temperature – all enzymes have an optimum temperature at which they perform
pH - extreme changes in pH can cause enzymes to denature making them unable to function
Enzyme concentration – increase the rate of reaction only until substrate is used up
Substrate concentration – will only have an affect if it is a limiting factor; meaning it is stopping a reaction from occurring
pH’s Affect on Enzymes
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