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Which of these organelles does not conta...

Which of these organelles does not contain ribosomes
I. Rough endoplasmic reticulum II . Chloroplast. III. Golgi apparatus IV. Mitochondria

A

I and II

B

I and IV

C

IV only

D

III only

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the listed organelles does not contain ribosomes, we will analyze each option one by one. ### Step-by-Step Solution: 1. **Rough Endoplasmic Reticulum (RER)**: - The Rough Endoplasmic Reticulum is characterized by the presence of ribosomes on its surface, which gives it a "rough" appearance. - It is involved in the synthesis of proteins, particularly glycoproteins. - **Conclusion**: The RER contains ribosomes. 2. **Chloroplast**: - Chloroplasts are semi-autonomous organelles found in plant cells. - They contain their own DNA and ribosomes (specifically, 70S ribosomes, similar to those found in prokaryotes). - **Conclusion**: Chloroplasts contain ribosomes. 3. **Golgi Apparatus**: - The Golgi apparatus is involved in the sorting, packaging, and transportation of proteins. - Unlike the RER and chloroplasts, the Golgi apparatus does not have ribosomes on its surface. - **Conclusion**: The Golgi apparatus does not contain ribosomes. 4. **Mitochondria**: - Mitochondria are also semi-autonomous organelles that contain their own DNA and ribosomes (70S ribosomes). - They are involved in energy production through cellular respiration. - **Conclusion**: Mitochondria contain ribosomes. ### Final Answer: Based on the analysis, the organelle that does not contain ribosomes is the **Golgi apparatus (III)**. ---
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