Multiple Choice
Which type of biological molecule primarily serves as enzymes that speed up cellular processes?
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7. Energy and Metabolism
Enzymes
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Which of the following best describes the role of the active site in an enzyme's function?
A
It is the region where the substrate binds and the chemical reaction occurs.
B
It is the region responsible for transporting the enzyme to the nucleus.
C
It is the part of the enzyme that provides structural support.
D
It is the site where inhibitors permanently deactivate the enzyme.
Verified step by step guidance1
Understand the role of enzymes: Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur.
Define the active site: The active site is a specific region on the enzyme where the substrate binds. It has a unique shape and chemical properties that match the substrate, allowing the enzyme to perform its function.
Explain substrate binding: When the substrate binds to the active site, it forms an enzyme-substrate complex. This interaction is highly specific, often described as a 'lock and key' or 'induced fit' model.
Describe the chemical reaction: Once the substrate is bound, the enzyme facilitates the chemical reaction, converting the substrate into the product(s). The active site is directly involved in this process.
Clarify misconceptions: The active site is not responsible for transporting the enzyme to the nucleus, providing structural support, or permanently deactivating the enzyme through inhibitors. Its primary role is to bind the substrate and catalyze the reaction.
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