Synthesis of lipids & carbohydrates is regulated by-

Options

A. SER
B. RER
C. Ribosomes
D. Lysosomes

Answer

To solve the question regarding the regulation of lipid and carbohydrate synthesis, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Smooth Endoplasmic Reticulum (SER)
- B) Rough Endoplasmic Reticulum (RER)
- C) Ribosome
- D) Lysosome

2. **Analyze Smooth Endoplasmic Reticulum (SER)**:
- The smooth endoplasmic reticulum is a network of folded tubular structures.
- Its primary functions include the synthesis of lipids and carbohydrates.
- It is also involved in the metabolism of carbohydrates and the synthesis of steroid hormones.
- Therefore, the SER is directly involved in the synthesis of lipids and carbohydrates.

3. **Analyze Rough Endoplasmic Reticulum (RER)**:
- The rough endoplasmic reticulum is characterized by the presence of ribosomes on its surface.
- Its main function is the synthesis of proteins, not lipids or carbohydrates.
- Thus, it does not regulate the synthesis of lipids and carbohydrates.

4. **Analyze Ribosomes**:
- Ribosomes are the cellular structures where protein synthesis occurs.
- They do not play a direct role in the synthesis of lipids or carbohydrates.
- Therefore, ribosomes are not the correct answer.

5. **Analyze Lysosomes**:
- Lysosomes contain hydrolytic enzymes that help in breaking down waste materials and cellular debris.
- They are not involved in the synthesis of lipids or carbohydrates.
- Hence, lysosomes are also not the correct answer.

6. **Conclusion**:
- After analyzing all options, the smooth endoplasmic reticulum (SER) is the only organelle that regulates the synthesis of lipids and carbohydrates.
- Therefore, the correct answer is **A) Smooth Endoplasmic Reticulum**.

### Final Answer:
The synthesis of lipids and carbohydrates is regulated by the **Smooth Endoplasmic Reticulum**.

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