Enzymes: Structure, Function, and Regulation
A Grade 12 science worksheet covering enzyme structure, mechanisms, factors affecting activity, and regulation.
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Enzymes: Structure, Function, and Regulation
Name:
Date:
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Read each question carefully and provide your answers in the spaces provided. For multiple-choice questions, circle the letter corresponding to the correct answer.
1. Which of the following best describes the primary function of enzymes?
To provide structural support to cells.
To store genetic information.
To catalyze biochemical reactions.
To transport molecules across membranes.
2. The 'lock and key' model of enzyme action suggests that:
Enzymes can bind to any substrate.
The active site is rigid and highly specific.
Substrates change shape to fit the enzyme.
Enzyme activity is independent of temperature.
3. Enzymes are biological catalysts, primarily composed of .
4. The region on an enzyme where the substrate binds is called the site.
5. A non-protein organic molecule that is required for the activity of certain enzymes is known as a .
6. Increasing the temperature indefinitely will always increase enzyme activity.
True
False
7. Competitive inhibitors bind to the active site of an enzyme.
True
False
8. Describe the 'induced fit' model of enzyme action and how it differs from the 'lock and key' model.
9. Explain how pH affects enzyme activity and the concept of optimal pH.
10. Label the diagram below with the terms: Enzyme, Substrate, Active Site, Enzyme-Substrate Complex, Products.
A:
B:
C:
D:
E:
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