Q.Define enzymes

Enzymes are highly specific protein biocatalysts that speed up essentially every biochemical reaction running inside a living cell -- digestion, energy harvesting, biosynthesis -- typically accelerating rates by a factor of around 10⁵. Their high specificity (carbonic anhydrase on carbonic acid, sucrase on sucrose, lactase on lactose) lets many different reactions proceed simultaneously in the same cell without interfering with one another. …