The detailed structural study of cell membrane was possible after the year:

Answer

To determine the year after which the detailed structural study of the cell membrane was possible, we can follow these steps:

1. **Understanding the Cell Membrane**: The cell membrane is a crucial part of the cell, acting as a barrier and playing a vital role in maintaining the cell's environment. To study its structure in detail, advanced techniques are required.

2. **Introduction of Electron Microscopy**: The detailed structural study of cellular components, including the cell membrane, became feasible with the invention of the electron microscope. This type of microscope allows scientists to observe structures at a much higher resolution than light microscopes.

3. **Year of Electron Microscope Discovery**: The electron microscope was developed in the 1950s. This technological advancement marked a significant turning point in cell biology, allowing for the visualization of cellular structures in detail.

4. **Significant Studies Post-1950**: In the 1970s, researchers such as Singer and Nicholson utilized the electron microscope to study the cell membrane. They proposed the fluid mosaic model, which describes the structure of the cell membrane in detail.

5. **Conclusion**: Therefore, the detailed structural study of the cell membrane was made possible after the year 1950, coinciding with the advent of electron microscopy.

**Final Answer**: The detailed structural study of the cell membrane was possible after the year **1950**.

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