Who proposed Fluid-mosaic model of plasma membrane?

Explanation

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

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

2. **Recall the Key Information**: The fluid mosaic model describes the structure of the plasma membrane, which is essential for understanding cell biology.

3. **Provide the Answer**: The fluid mosaic model was proposed by two scientists, Singer and Nicholson.

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