<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 digestion. Context: Enzymes play a crucial role in digestion by speeding up chemical reactions to break down food into nutrients. Answer: [/INST]They are biological molecules that act as catalysts to speed up chemical reactions involved in breaking down food into nutrients.</s>