Multiple Choice
Which of the following suggests that the shape of an enzyme determines the enzyme’s function?
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7. Energy and Metabolism
Enzymes
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Which of the following best defines an active site of an enzyme?
A
The specific region of an enzyme where the substrate binds and catalysis occurs.
B
A region on the enzyme that binds to regulatory molecules but not substrates.
C
The site on the substrate that interacts with the enzyme.
D
The area of the enzyme that is responsible for its overall shape and stability.
Verified step by step guidance1
Understand the concept of an enzyme: Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur.
Learn about the active site: The active site is a specific region on the enzyme where the substrate binds. This binding is highly specific, often described as a 'lock and key' or 'induced fit' model.
Recognize the role of the active site: Once the substrate binds to the active site, the enzyme facilitates the chemical reaction, converting the substrate into the product(s). This process is known as catalysis.
Differentiate the active site from other regions: The active site is distinct from other parts of the enzyme, such as regions that bind regulatory molecules or areas responsible for the enzyme's overall shape and stability.
Identify the correct definition: Based on the explanation, the active site is best defined as 'The specific region of an enzyme where the substrate binds and catalysis occurs.'
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