The unit membrane concept was given by

Options

A. Danielli Davson
B. Robertson
C. Singer
D. Nicolson

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks who proposed the unit membrane concept. The options provided are Daniel E. Dabson, Robertson, Singer, and Nicholson.

2. **Identify the Correct Concept**: The unit membrane concept describes biological membranes as a lipid bilayer with proteins on either side. This concept was specifically proposed by Robertson.

3. **Review Other Models**:
- **Dabson-Daniele Model**: This model, proposed by Daniel E. Dabson and James Daniele in 1935, describes a phospholipid layer between two layers of globular proteins but is not the unit membrane concept.
- **Fluid Mosaic Model**: Proposed by Singer and Nicholson, this model describes the plasma membrane as a mosaic of various components, including phospholipids, proteins, and carbohydrates, but does not refer to the unit membrane concept.

4. **Conclusion**: Based on the information reviewed, the unit membrane concept was given by Robertson.

5. **Final Answer**: The correct answer is Robertson.

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