Multiple Choice
Which statement about enzymes is true?
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7. Energy and Metabolism
Enzymes
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How does the structure of an enzyme contribute to its function?
A
The active site of the enzyme is specifically shaped to bind to its substrate.
B
The enzyme's structure is rigid and does not change during the reaction.
C
The enzyme's structure prevents it from interacting with any substrate.
D
The enzyme's structure allows it to be used up in the reaction.
Verified step by step guidance1
Understand that enzymes are biological catalysts that speed up chemical reactions without being consumed in the process.
Recognize that the structure of an enzyme is crucial to its function, particularly the active site, which is a specific region where the substrate binds.
The active site of an enzyme is uniquely shaped to fit a specific substrate, much like a key fits into a lock. This specificity is due to the three-dimensional structure of the enzyme.
During the reaction, the enzyme may undergo a slight change in shape to better accommodate the substrate, a concept known as 'induced fit.' This flexibility is essential for the enzyme's catalytic activity.
Enzymes are not rigid; they are dynamic molecules that can change shape slightly to facilitate the conversion of substrates into products, and they are not used up in the reaction, allowing them to be reused multiple times.
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