Mechanical support, enzyme circulation, protein synthesis and detoxification of drugs are the function of

Options

A. ER
B. ribosomes
C. dictyosomes
D. chloroplast

Answer

**Step-by-Step Solution:**

1. **Understanding the Functions Listed:**
- The question lists four functions: mechanical support, enzyme circulation, protein synthesis, and detoxification of drugs. We need to identify which cellular structure is responsible for all these functions.

2. **Analyzing Each Option:**
- **Option 1: Endoplasmic Reticulum (ER)**
- The ER is known to provide mechanical support in the cell. It consists of two types:
- **Smooth ER:** Involved in detoxification of drugs and synthesis of lipids and carbohydrates.
- **Rough ER:** Has ribosomes on its surface and is primarily responsible for protein synthesis.
- Therefore, the ER is involved in all four functions mentioned.

- **Option 2: Ribosomes**
- Ribosomes are primarily responsible for protein synthesis. They do not provide mechanical support, enzyme circulation, or detoxification of drugs.

- **Option 3: Dictyosomes (Golgi Apparatus)**
- Dictyosomes are mainly involved in secretion and processing of proteins. They do not perform all the functions listed in the question.

- **Option 4: Chloroplasts**
- Chloroplasts are involved in photosynthesis and do not play a role in mechanical support, enzyme circulation, or detoxification of drugs.

3. **Conclusion:**
- After analyzing all options, it is clear that the only structure that performs mechanical support, enzyme circulation, protein synthesis, and detoxification of drugs is the **Endoplasmic Reticulum**.

**Final Answer:**
- The correct answer is **Option 1: Endoplasmic Reticulum**.

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