Who proposed fluid mosaic model to explain structure and functions of a plasma membrane ?

Answer

**Step-by-Step Text Solution:**

1. **Identify the Model**: The question asks about the fluid mosaic model, which is a scientific model used to describe the structure and function of the plasma membrane.

2. **Proposers of the Model**: The fluid mosaic model was proposed by two scientists, S.J. Singer and G. Nicolson.

3. **Year of Proposal**: This model was introduced in the year 1972.

4. **Function of the Model**: The fluid mosaic model explains how the plasma membrane is structured and how it functions, particularly in animal cells.

5. **Components of the Plasma Membrane**: According to this model, the plasma membrane is composed of phospholipids, proteins, cholesterol, and carbohydrates.

6. **Nature of the Plasma Membrane**: The model describes the plasma membrane as having a quasi-fluid nature, where protein molecules can move within the lipid bilayer, resembling a mosaic.

7. **Conclusion**: Therefore, the fluid mosaic model was proposed by S.J. Singer and G. Nicolson in 1972 to explain the structure and functions of the plasma membrane.

**Final Answer**: The fluid mosaic model was proposed by S.J. Singer and G. Nicolson in 1972.

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