<prompt> Fluid mosaic model was proposed bySinger and NicolsonDavid RobesonMeselson and SahliRobe Darwin  <response>: 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. 