SER is concerned with

Options

A. lysosome
B. protein synthesis
C. sphaerosome
D. all of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks what the Smooth Endoplasmic Reticulum (SER) is concerned with.

2. **Identifying SER**: The Smooth Endoplasmic Reticulum (SER) is a type of endoplasmic reticulum that lacks ribosomes on its surface, distinguishing it from the Rough Endoplasmic Reticulum (RER), which has ribosomes.

3. **Functions of SER**: The primary functions of the SER include:
- Synthesis of lipids (fats).
- Metabolism of carbohydrates.
- Detoxification of drugs and poisons.
- Storage of calcium ions.

4. **Analyzing the Options**:
- **Option 1: Lysosome**: Lysosomes are not produced by the SER; they are formed from the Golgi apparatus.
- **Option 2: Protein Synthesis**: Protein synthesis primarily occurs in the RER due to the presence of ribosomes.
- **Option 3: Spherosome**: Spherosomes are involved in the storage and synthesis of lipids, which is related to the functions of the SER.
- **Option 4: All of these**: This option cannot be correct since not all listed functions pertain to the SER.

5. **Conclusion**: The SER is primarily concerned with lipid synthesis and metabolism, which aligns with the function of spherosomes. Therefore, the correct answer is **Option 3: Spherosome**.

---