The fluid mosaic model of cell membrane was given by

Options

A. S.J. Singer and G.L. Nicolson
B. S.S. Singer and G.L. Nicolson
C. S.J. Singer and H.L. Nicolson
D. S.S. Singer and J.L. Nicolson

Answer

### Step-by-Step Text Solution:

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

2. **Identifying Key Terms**: The fluid mosaic model is a concept that describes the structure of the plasma membrane, emphasizing the fluid nature of the lipid bilayer and the mosaic of proteins that float in or on the fluid lipid bilayer.

3. **Recognizing the Scientists**: The fluid mosaic model was proposed by two scientists. It is important to remember their names and initials correctly.

4. **Correct Names**: The correct names are SJ Singer and GL Nicholson. They introduced this model in 1972.

5. **Understanding the Model**: The fluid mosaic model describes how the cell membrane is composed of a phospholipid bilayer with embedded proteins. The phospholipids have a hydrophilic (polar) head and hydrophobic (non-polar) tails, allowing for a flexible and dynamic membrane structure.

6. **Evaluating the Options**:
- Option A: SJ Singer and GL Nicholson - Correct
- Option B: SS Singer and GL Nicholson - Incorrect (full name is SJ Singer)
- Option C: SJ Singer and HL Nicholson - Incorrect (full name is GL Nicholson)
- Option D: SS Singer and JL Nicholson - Incorrect (full name is SJ Singer and GL Nicholson)

7. **Conclusion**: The correct answer to the question is option A: SJ Singer and GL Nicholson.