Here's why:
* Enzymes are proteins: Almost all enzymes are proteins, although some are RNA molecules called ribozymes.
* Catalysts speed up reactions: Enzymes act as catalysts, meaning they speed up the rate of a chemical reaction without being consumed in the process.
* Specificity: Enzymes are highly specific, meaning they only catalyze a particular reaction or a small number of reactions.
* Essential for life: Enzymes are essential for all biological processes, from digestion to energy production to cell signaling.
So, while there are many different types of enzymes with diverse functions, they all share the characteristic of being biological catalysts.
