The cell organelle involved in the glycosylation of proteins is

Options

A. Ribosomes
B. Peroxisomes
C. Mitochondria
D. Endoplasmic reticulum

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks which cell organelle is involved in the glycosylation of proteins. Glycosylation is the process of adding carbohydrate groups to proteins, which is crucial for their function and stability.

2. **Review the Options**: The options provided are:
- A) Ribosome
- B) Peroxisome
- C) Mitochondria
- D) Endoplasmic Reticulum

3. **Evaluate Each Option**:
- **Ribosome**: Ribosomes are primarily responsible for protein synthesis, not glycosylation. Therefore, this option is incorrect.
- **Peroxisome**: Peroxisomes are involved in fatty acid metabolism and detoxification processes, not in glycosylation. This option is also incorrect.
- **Mitochondria**: Mitochondria are known as the powerhouse of the cell, as they are involved in ATP production. They do not play a role in glycosylation, making this option incorrect as well.
- **Endoplasmic Reticulum (ER)**: The ER is divided into two types: smooth and rough. The rough endoplasmic reticulum (RER) has ribosomes attached to it and is specifically involved in the glycosylation of proteins. This makes the endoplasmic reticulum the correct answer.

4. **Conclusion**: After evaluating all the options, the correct answer is **D) Endoplasmic Reticulum**.

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