The fluid mosaic model explains

Options

A. structural aspects of cell membrane
B. functional aspects of cell membrane
C. structural and functional aspects both
D. none of the above

Answer

### Step-by-Step Solution:

1. **Understanding the Fluid Mosaic Model**:
- The fluid mosaic model is a widely accepted explanation of the structure of cell membranes. It describes the cell membrane as a mosaic of various components that are fluid in nature.

2. **Components of the Cell Membrane**:
- The cell membrane is primarily composed of phospholipids, proteins, cholesterol, and carbohydrates. These components contribute to the overall structure and function of the membrane.

3. **Structural Aspects**:
- The term "mosaic" refers to the arrangement of different types of molecules (like proteins and lipids) that are embedded in or associated with the phospholipid bilayer. This arrangement gives the membrane its unique structure.

4. **Functional Aspects**:
- The fluid nature of the membrane allows for flexibility and movement of the components within the membrane. This fluidity is essential for various functions such as transport of substances, cell signaling, and interaction with other cells.

5. **Permeability**:
- The model explains the selective permeability of the membrane, allowing certain substances (like electrolytes and non-electrolytes) to pass through while restricting others.

6. **Cell Interactions**:
- The structural peculiarities of the membrane facilitate various interactions, including cell recognition, attachment, and signaling, which are crucial for the functioning of cells in multicellular organisms.

7. **Conclusion**:
- Therefore, the fluid mosaic model explains both the structural and functional aspects of the cell membrane. The correct answer to the question is option C: both structural and functional aspects.