Enzymes accelerate chemical reactions due to close interaction with molecules of substrates – the initial reacting substances. Not the entire enzyme molecule interacts with the substrate, but only a small portion of it — the active center. Most often, it is formed by several amino acid residues. The shape and chemical structure of the active center are such that only certain substrates can bind to it due to the correspondence of their spatial structures. Enzymes are proteins, therefore, they only work actively in a certain range of pH, temperature and other factors.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.