Define enzyme

An enzyme is a biological molecule that acts as a catalyst in various biochemical reactions. It is typically a protein that speeds up the rate of a specific chemical reaction without being consumed or permanently altered in the process. Enzymes play a crucial role in the functioning of cells and are involved in processes such as digestion, metabolism, and DNA replication. They work by binding to specific molecules, called substrates, and facilitating the conversion of these substrates into products. Enzymes are highly specific, meaning that each enzyme is designed to catalyze a particular reaction. They are also sensitive to factors such as temperature, pH, and substrate concentration, which can affect their activity. Overall, enzymes are essential for maintaining the balance and efficiency of biochemical reactions in living organisms.