In plant cell, which organelle secrets pectin, hemicellulose, proteins and microfibrils of cellulose to make cell wall ?

Options

A. ER
B. plasma membrane
C. dictyosomes
D. glyoxysomes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks which organelle in a plant cell is responsible for secreting substances like pectin, hemicellulose, proteins, and microfibrils of cellulose that are essential for the formation of the cell wall.

2. **Identifying the Options:**
The options provided include various organelles:
- Endoplasmic Reticulum (ER)
- Plasma Membrane
- Dictyosomes (Golgi Complex)
- Glycosomes

3. **Analyzing Each Option:**
- **Endoplasmic Reticulum (ER):**
- The ER is involved in protein synthesis (rough ER) and lipid synthesis (smooth ER). However, it does not directly secrete materials for the cell wall.
- **Plasma Membrane:**
- The plasma membrane serves as a protective barrier and regulates the entry and exit of substances but does not play a role in cell wall formation.
- **Dictyosomes (Golgi Complex):**
- The dictyosomes, which are the plant equivalent of the Golgi apparatus, are crucial for synthesizing and secreting components necessary for the cell wall, including pectin, hemicellulose, proteins, and cellulose microfibrils.
- **Glycosomes:**
- Glycosomes are involved in fatty acid metabolism and the glyoxylate cycle, not in cell wall formation.

4. **Conclusion:**
After analyzing the options, the correct answer is **Dictyosomes (Golgi Complex)**, as they are responsible for secreting the materials needed to form the plant cell wall.

**Final Answer:**
The organelle in plant cells that secretes pectin, hemicellulose, proteins, and microfibrils of cellulose to make the cell wall is the **Dictyosome**.

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