Structure & function of plasma membrane.   Who proposed the Fluid Mosaic Model? A) Watson and Crick B) Singer and Nicolson C) Schleiden and Schwann D) Robert Hooke Answer: B) Singer and Nicolson (1972) Explanation: The Fluid Mosaic Model, proposed by Singer and Nicolson, describes the plasma membrane as a flexible bilayer with proteins embedded like a mosaic. Lipids and proteins move laterally, explaining membrane fluidity. This model replaced the outdated “Sandwich Model”, where proteins were thought to coat the lipid bilayer externally. The main lipid component of the plasma…

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