Multiple Choice
How do enzymes in the body speed up chemical reactions?
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7. Energy and Metabolism
Enzymes
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How is the structure of an enzyme related to its function?
A
Enzymes are flexible and can change their shape to fit any substrate.
B
The specific shape of an enzyme allows it to bind to its substrate, facilitating a chemical reaction.
C
The structure of an enzyme is irrelevant to its function, as enzymes can catalyze any reaction.
D
The structure of an enzyme is only important for its stability, not its function.
Verified step by step guidance1
Understand that enzymes are biological catalysts that speed up chemical reactions in the body without being consumed in the process.
Recognize that the function of an enzyme is highly dependent on its three-dimensional structure, which is determined by the sequence of amino acids in its polypeptide chain.
Learn about the 'lock and key' model, where the enzyme's active site (the 'lock') is specifically shaped to fit a particular substrate (the 'key'), allowing the enzyme to catalyze a specific reaction.
Consider the 'induced fit' model, which suggests that while the enzyme's active site is specific to the substrate, it can undergo slight conformational changes to better fit the substrate and facilitate the reaction.
Acknowledge that any change in the enzyme's structure, such as denaturation due to temperature or pH changes, can affect its ability to bind to the substrate and thus its catalytic activity.
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