Which structures are responsible for lipid synthesis respectively in plants and animal cells :-

Options

A. Smooth E. R.
B. Smooth and rough E. R.
C. Smooth E. R. and sphaerosomes
D. Sphaerosomes and smooth E. R.

Answer

To answer the question regarding the structures responsible for lipid synthesis in plants and animal cells, we can break down the solution step by step:

### Step-by-Step Solution:

1. **Identify the Structures in Animal Cells:**
- In animal cells, the primary structure responsible for lipid synthesis is the **Smooth Endoplasmic Reticulum (SER)**. The SER is involved in the production of lipids, including phospholipids and cholesterol, which are essential for cell membrane formation and other cellular functions.

2. **Identify the Structures in Plant Cells:**
- In plant cells, the structure responsible for lipid synthesis is the **Spherosome** (also known as oil bodies). Spherosomes are small organelles that store lipids and are involved in the synthesis of various lipids, including oils and fats.

3. **Compare and Conclude:**
- Therefore, when comparing the structures responsible for lipid synthesis in both types of cells:
- **Animal Cells:** Smooth Endoplasmic Reticulum
- **Plant Cells:** Spherosome

4. **Final Answer:**
- The correct answer to the question is: **Smooth Endoplasmic Reticulum for animal cells and Spherosome for plant cells.**