Presence of bilayered lipid in the cell membrane was first reported by

Options

A. Singer
B. Nicholson
C. Davson and Danielli
D. Corti and Fontana

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks who first reported the presence of a bilayered lipid structure in the cell membrane.

2. **Identifying the Options:**
- A) Singer and Nicholson
- B) Devson and Danily
- C) Cotty and Fontana

3. **Analyzing Each Option:**
- **Singer and Nicholson:** They proposed the fluid mosaic model of the plasma membrane in 1972, which is widely accepted today. However, they did not report the bilayered lipid structure first.
- **Devson and Danily:** They proposed the bilayer lipid model in 1935, which described the plasma membrane as being composed of two lipid layers. This model was also referred to as the trilaminar model due to the presence of proteins covering the lipid bilayer.
- **Cotty and Fontana:** They are known for their work on the living part of the cell, which was later termed protoplasm, but they did not report the bilayered lipid structure.

4. **Conclusion:** The correct answer is **B) Devson and Danily**, as they were the first to report the presence of the bilayered lipid structure in the cell membrane in 1935.

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