Carbohydrates which present in the cell membrane take part in :-

Options

A. Transport of substance
B. Cell recognition
C. Attachment to microfilament
D. Attachment to microtubules

Answer

**Step-by-Step Solution:**

1. **Understanding Cell Membrane Composition**: The cell membrane is composed of various biomolecules, including lipids, proteins, and carbohydrates. Carbohydrates are often attached to proteins and lipids in the membrane.

2. **Identifying the Role of Carbohydrates**: Carbohydrates in the cell membrane are primarily involved in forming structures known as glycocalyx. Glycocalyx consists of glycoproteins (carbohydrates attached to proteins) and glycolipids (carbohydrates attached to lipids).

3. **Functions of Glycocalyx**: The glycocalyx plays several important roles:
- **Cell Recognition**: The carbohydrates on the surface of cells help in recognizing other cells. This is crucial for the immune response and tissue formation.
- **Attachment**: Glycocalyx can help cells attach to each other and to the extracellular matrix, which is important for maintaining tissue structure.
- **Protection**: It provides a cushioning effect and protects the cell from mechanical damage.

4. **Conclusion**: Among the functions of carbohydrates in the cell membrane, the most significant role is in **cell recognition**. This allows cells to identify and interact appropriately with their environment and other cells.

**Final Answer**: Carbohydrates present in the cell membrane take part in **cell recognition**.

---