The ribosomes are found attached to the membrane of

Options

A. chloroplast
B. mitochondria
C. endoplasmic reticulum
D. Golgi complex

Answer

**Step-by-Step Solution:**

1. **Understanding Ribosomes**: Ribosomes are cellular structures responsible for protein synthesis. They can either be free in the cytoplasm or attached to membranes.

2. **Analyzing Options**: The question provides four options: chloroplast, mitochondria, endoplasmic reticulum, and Golgi complex. We need to determine which of these structures has ribosomes attached to its membrane.

3. **Chloroplast**: Chloroplasts are involved in photosynthesis and are not primarily associated with protein synthesis. Therefore, ribosomes are not typically found attached to chloroplast membranes.

4. **Mitochondria**: Mitochondria are known as the powerhouse of the cell, responsible for energy production through cellular respiration. They do not have ribosomes attached to their membranes for protein synthesis.

5. **Endoplasmic Reticulum (ER)**: The endoplasmic reticulum is a network of membranes involved in protein and lipid synthesis. The rough endoplasmic reticulum (RER) specifically has ribosomes attached to its surface, making it the site of protein synthesis. This is the correct answer.

6. **Golgi Complex**: The Golgi complex is involved in processing and packaging proteins but does not have ribosomes attached to its membrane. Therefore, it is not the correct answer.

7. **Conclusion**: Based on the analysis, ribosomes are found attached to the membrane of the endoplasmic reticulum, specifically the rough endoplasmic reticulum.

**Final Answer**: The ribosomes are found attached to the membrane of the **endoplasmic reticulum**.

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