<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  Explain the role of enzymes in chemical reactions. Context: Enzymes act as biological catalysts that speed up the rate of chemical reactions in living organisms. Answer: [/INST]It is to act as biological catalysts that speed up the rate of chemical reactions in living organisms.</s>