Tripartile nature of plasmalemma was discovered by

Options

A. Davson
B. Robertson
C. Danielli
D. Both A and B

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the discovery of the tripartite nature of the plasmalemma (or plasma membrane).

2. **Defining Plasmalemma**: The plasmalemma, also known as the plasma membrane or cell membrane, is a phospholipid bilayer that serves as a selectively permeable barrier, separating the interior of the cell from the external environment.

3. **Identifying Key Scientists**: The options provided include Davidson, Robertson, Daneley, and both A and B.

4. **Exploring the Tripartite Nature**: The tripartite nature refers to the trilaminar model of the plasma membrane, which consists of three layers: two outer hydrophilic layers (heads of phospholipids) and one inner hydrophobic layer (tails of phospholipids).

5. **Robertson's Contribution**: The scientist who is credited with the discovery of the tripartite nature of the plasma membrane is Robertson. He proposed the trilaminar model based on electron microscopy observations, identifying two electron-dense layers and one electron-lucent layer.

6. **Conclusion**: Based on the information, the correct answer to the question is **Robertson**.

**Final Answer**: Robertson discovered the tripartite nature of the plasmalemma.

---