which cell organelles is concerned with glycosylation of protein?

Options

A. Ribosome
B. Peroxisome
C. Endoplasmic reticulum
D. Mitochondria

Answer

To determine which cell organelle is concerned with the glycosylation of proteins, we can analyze the options provided:

1. **Ribosome**:
- Ribosomes are responsible for synthesizing proteins by translating messenger RNA (mRNA) into polypeptide chains. They do not play a direct role in the modification of proteins, such as glycosylation.
- **Conclusion**: Not the correct answer.

2. **Peroxisome**:
- Peroxisomes are involved in various metabolic processes, including the breakdown of fatty acids and the detoxification of hydrogen peroxide. They are not involved in protein glycosylation.
- **Conclusion**: Not the correct answer.

3. **Endoplasmic Reticulum (ER)**:
- The endoplasmic reticulum, particularly the rough ER, is involved in the synthesis and initial modification of proteins. Glycosylation, which is the addition of carbohydrate groups to proteins, occurs in the ER. This makes the ER a key organelle in the glycosylation process.
- **Conclusion**: This is the correct answer.

4. **Mitochondria**:
- Mitochondria are primarily known for their role in energy production through the oxidation of organic molecules. They do not participate in the glycosylation of proteins.
- **Conclusion**: Not the correct answer.

Based on this analysis, the correct answer to the question is the **Endoplasmic Reticulum**.