Select the correct malching in the following parts:

Options

A. Rough ER--Synthesis of glycogen
B. Rough ER--Oxidatiun of fatty acids
C. Smooth ER-Oxidaion of phospholipids
D. Smooth ER---Synthesis of lipids

Answer

### Step-by-Step Solution:

1. **Understanding the Rough Endoplasmic Reticulum (RER)**:
- The Rough Endoplasmic Reticulum is primarily involved in the synthesis of proteins. It is called "rough" because it has ribosomes attached to its surface, which are the sites of protein synthesis.

2. **Evaluating the Options for RER**:
- The first option states that RER is involved in the synthesis of glycogen. This is incorrect, as glycogen synthesis occurs primarily in the liver and muscle cells, not in the RER.
- The second option claims RER is responsible for the oxidation of fats. This is also incorrect, as fat oxidation mainly occurs in the mitochondria and peroxisomes.
- The third option states that RER is involved in the oxidation of phospholipids. This is incorrect as well; phospholipid synthesis occurs in the smooth endoplasmic reticulum.

3. **Understanding the Smooth Endoplasmic Reticulum (SER)**:
- The Smooth Endoplasmic Reticulum does not have ribosomes and is involved in the synthesis of lipids, including phospholipids and cholesterol.

4. **Evaluating the Options for SER**:
- The option stating that the smooth endoplasmic reticulum is involved in the synthesis of lipids is correct. This is the primary function of the SER.

5. **Conclusion**:
- After evaluating all the options, the correct matching is that the Smooth Endoplasmic Reticulum is responsible for the synthesis of lipids. Therefore, the fourth option is the correct answer.

### Final Answer:
The correct matching is: **Smooth Endoplasmic Reticulum - Synthesis of Lipids**.

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