A three dimensional dcavity bearing a specific charge by which the enzyme reacts with its substrate is called_________________?
Correct answer: A. Active site
- A. Active site
- B. Binding site
- C. Catalytic site
- D. Allosteric site
Explanation
The active site is the three-dimensional region of an enzyme with a specific shape and chemical environment that binds the substrate and carries out catalysis. The likely alternative is binding site, but a binding site may only attach a molecule, whereas the active site includes both binding and catalytic regions.
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About Mode of Enzyme Action
Enzyme action depends on the active site forming a temporary enzyme substrate complex, then converting substrate into products with lower activation energy. The lock and key and induced fit models explain specificity and binding, while cofactors and changes in enzyme shape can affect catalysis.
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