Enzymes: Biological Catalysts
A Grade 9 science worksheet on enzymes, their function, factors affecting activity, and importance in biological processes.
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Enzymes: Biological Catalysts
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. What is the primary function of an enzyme in a biochemical reaction?
To increase the activation energy
To decrease the activation energy
To change the products of the reaction
To provide energy for the reaction
2. The 'lock and key' model describes how:
Enzymes can bind to any substrate
Each enzyme is specific to a particular substrate
Enzymes are destroyed after each reaction
Substrates change shape to fit the enzyme
3. Enzymes are biological that speed up the rate of biochemical reactions.
4. The specific region on an enzyme where the substrate binds is called the .
5. When an enzyme loses its three-dimensional structure and can no longer function, it is said to be .
6. Enzymes are consumed during the reactions they catalyze.
True
False
7. Increasing the temperature indefinitely will always increase enzyme activity.
True
False
8. Name two factors that can affect the rate of enzyme activity.
9. Explain why extreme changes in pH can lead to enzyme denaturation.
10. Observe the diagram below, which illustrates the basic mechanism of enzyme action. Label the enzyme, substrate, and active site.
