Cells of aleurone layer contain

Options

A. fats
B. starch
C. proteins
D. sugars

Answer

### Step-by-Step Solution:

1. **Understanding the Aleurone Layer**:
- The aleurone layer is an outer layer of the endosperm found in the seeds of many flowering plants. It acts like an epidermis and plays a crucial role during the germination process.

2. **Function of the Aleurone Layer**:
- During germination, the aleurone layer performs important digestive functions. It secretes enzymes, such as hydrolytic enzymes, which help break down stored starches and proteins in the endosperm.

3. **What is Endosperm?**:
- Endosperm is the tissue produced inside the seeds of flowering plants after fertilization. It serves as a nutrient source for the developing embryo, supplying essential nutrients and acting as a protective barrier.

4. **Composition of the Aleurone Layer**:
- The cells of the aleurone layer contain protein. Aleurone is a type of protein that is found in the protein granules of maturing seeds and tubers.

5. **Conclusion**:
- Therefore, the cells of the aleurone layer primarily contain proteins, which are essential for the germination process.

### Final Answer:
The cells of the aleurone layer contain proteins.

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