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
Fluid mosaic model was proposed by 
Select and explain. 
A. Singer and Nicolson, B. David Robeson, C. Meselson and Sahli, D. Robe Darwin
A: Singer and Nicolson
Answer: A: Singer and Nicolson 
Explanation: 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.