Fluid-mosaic model of plasma membrane was proposed by

Options

A. Singer and Nicholson
B. Schleiden and Schwann
C. Loewy and Siekwitz
D. Robert Hooke

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks who proposed the fluid-mosaic model of the plasma membrane.

2. **Identifying the Key Terms**: The term "fluid-mosaic model" refers to a specific scientific theory regarding the structure of the plasma membrane of cells.

3. **Recalling Relevant Information**: The fluid-mosaic model was proposed by two scientists, Singer and Nicholson, in the year 1972. This model describes the plasma membrane as a structure that is flexible (fluid) and composed of various components (mosaic), including phospholipids and proteins.

4. **Analyzing the Options**: The options provided are:
- A) Singer and Nicholson
- B) Schleder and Schwann
- C) Loewe and Swickwitz
- D) Robert Hooke

5. **Selecting the Correct Answer**: Among the options, the correct answer is A) Singer and Nicholson, as they are credited with proposing the fluid-mosaic model.

6. **Conclusion**: Therefore, the fluid-mosaic model of plasma membrane was proposed by Singer and Nicholson.

**Final Answer**: The fluid-mosaic model of plasma membrane was proposed by Singer and Nicholson.

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