The Golgi apparatus remains in close association with the endoplasmic reticulum, because-

Options

A. materials packaged by Golgi apparatus are transported to the ER
B. materials to be packaged by Golgi body transported to the Golgi body from ER
C. both Golgi apparatus and ER have cisternae
D. both Golgi apparatus and ER possess ribosomes

Answer

**Step-by-Step Solution:**

1. **Understanding the Golgi Apparatus and Endoplasmic Reticulum (ER):**
- The Golgi apparatus and the endoplasmic reticulum (ER) are both essential organelles in the cell. The ER is divided into two types: rough ER (RER), which has ribosomes and is involved in protein synthesis, and smooth ER (SER), which is involved in lipid synthesis.

2. **Function of the Endoplasmic Reticulum:**
- The rough ER synthesizes proteins, while the smooth ER synthesizes lipids. These synthesized materials (proteins and lipids) are then transported to the Golgi apparatus.

3. **Transport of Materials:**
- The proteins and lipids produced in the ER are sent to the Golgi apparatus for further processing. This transport occurs via vesicles that bud off from the ER and fuse with the Golgi apparatus.

4. **Modification in the Golgi Apparatus:**
- Once the materials reach the Golgi apparatus, they undergo modifications, such as glycosylation, where carbohydrates are added to proteins (forming glycoproteins) and lipids (forming glycolipids).

5. **Packaging and Distribution:**
- After modification, the Golgi apparatus packages these glycoproteins and glycolipids into vesicles, which are then transported to their final destinations, such as lysosomes or for secretion outside the cell.

6. **Conclusion:**
- The close association between the Golgi apparatus and the ER is crucial for the efficient transport and processing of proteins and lipids. The correct reason for their proximity is that materials to be packaged by the Golgi body are transported from the ER to the Golgi body.

**Final Answer:**
The Golgi apparatus remains in close association with the endoplasmic reticulum because materials to be packaged by the Golgi body are transported to the Golgi body from the ER.

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