Endoplasmic reticulum is more developed in

Options

A. Green cells
B. Young cells
C. Mature cells
D. Bacteriophages

Answer

**Step-by-Step Solution:**

1. **Definition of Endoplasmic Reticulum (ER):**
- The endoplasmic reticulum is a membranous network of tubular structures found within cells. It plays a crucial role in the transport of proteins, lipids, and steroids.

2. **Function of Endoplasmic Reticulum:**
- The primary function of the ER is to serve as the transport system of the cell, aiding in the synthesis and transport of various biomolecules.

3. **Development of ER in Different Cell Types:**
- The question asks in which type of cells the endoplasmic reticulum is more developed. It is important to consider the characteristics of different cell types.

4. **Focus on Young Cells:**
- The endoplasmic reticulum is more developed in young cells. This is because young cells are actively involved in growth and division.

5. **Relation to the Cell Cycle:**
- During the S phase of the cell cycle, young cells synthesize enzymes and proteins in preparation for cell division. The presence of a well-developed ER facilitates this process.

6. **Role of Ribosomes:**
- The endoplasmic reticulum has ribosomes attached to its surface, which are essential for protein synthesis. This further emphasizes the importance of a developed ER in young cells.

7. **Conclusion:**
- Therefore, the endoplasmic reticulum is more developed in young cells compared to mature cells or other types of cells, such as bacteriophages.

**Final Answer:**
Endoplasmic reticulum is more developed in young cells.

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