Enzymes are biological catalysts that are highly specific and efficient. Enzymes like carbonic anhydrase and enolase catalyze hydration reactions in biological systems. Carbonic anhydrase, for example, catalyzes the hydration of carbon dioxide to form bicarbonate, a crucial reaction in physiological pH regulation. Enzymes operate under mild conditions (temperature, pH) and are biodegradable, making them environmentally friendly options for catalysis.