This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Fluid mosaic model was proposed by \nSelect and explain. \nA. Singer and Nicolson, B. David Robeson, C. Meselson and Sahli, D. Robe Darwin', 'role': 'user'}, {'content': "Answer: A \nExplanation: Proposed by Singer and Nicolson. This model is likened to integral membrane protein 'icebergs' floating in a sea of predominantly fluid phospholipid molecules. At normal body temperature (37 0 C) the lipid bilayer is in a fluid state. The longer and more saturated fatty acid chains cause higher values of transition temperature.", 'role': 'assistant'}]