question: What is often said to be stored by cells in the structures of molecules of substances such as carbohydrates , lipids and proteins ?
answer: Energy
turker_answer: Energy is often said to be stored by cells in the structures of molecules of substances such as carbohydrates , lipids and proteins .
rule-based: Energy is often said to be stored by cells in the structures of molecules of substances such as carbohydrates , lipids and proteins .