Select the correct matching in the following pairs:

Options

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

Answer

To solve the question of selecting the correct matching in the pairs related to the endoplasmic reticulum, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Endoplasmic Reticulum (ER)**:
- The endoplasmic reticulum is a network of membranes in eukaryotic cells and has two main types: Rough Endoplasmic Reticulum (RER) and Smooth Endoplasmic Reticulum (SER).

2. **Identify the Functions of Rough Endoplasmic Reticulum (RER)**:
- The Rough ER is characterized by the presence of ribosomes on its surface, giving it a "rough" appearance.
- Its primary function is the synthesis of proteins. The ribosomes are the sites of protein synthesis.

3. **Identify the Functions of Smooth Endoplasmic Reticulum (SER)**:
- The Smooth ER lacks ribosomes, which gives it a "smooth" appearance.
- Its main functions include the synthesis of lipids and the metabolism of carbohydrates. It does not participate in protein synthesis.

4. **Evaluate the Given Options**:
- Based on the functions identified:
- **Option 1**: Smooth ER - Lipid synthesis (Correct)
- **Option 2**: Rough ER - Glycogen synthesis (Incorrect, it synthesizes proteins)
- **Option 3**: Rough ER - Fatty acid oxidation (Incorrect, this is not a function of RER)
- **Option 4**: Smooth ER - Phospholipid oxidation (Incorrect, SER synthesizes lipids, not oxidizes phospholipids)

5. **Conclusion**:
- The only correct matching is that the Smooth Endoplasmic Reticulum is involved in lipid synthesis.

### Final Answer:
- The correct matching in the pairs is **Option 1: Smooth ER - Lipid synthesis**.