This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'The following is not a constitute of cell membrane: \nSelect and explain. \nA. Cholesterol, B. Carbohydrates, C. Proteins, D. Nucleic acids', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cell is made of 3 substances: Lipid Proteins Carbohydrates', 'role': 'assistant'}]