The enzyme carbonic anhydrase catalyzes the conversion of carbon dioxide and water into bicarbonate and a proton. Which model better explains the action of carbonic anhydrase?

• A. Induced-Fit Model: The enzyme's active site undergoes a conformational change upon substrate binding, allowing it to better accommodate and catalyze the reaction.
• B. Lock-and-Key Model: The enzyme's active site has a rigid structure that perfectly fits the substrate, facilitating the reaction without significant conformational changes.
• C. Induced-Fit Model: The enzyme's active site remains rigid and does not change shape during substrate binding.
• D. Lock-and-Key Model: The enzyme's active site is highly flexible and adapts significantly to the shape of the substrate.

Answer: (A)