The aleurone layer is

Options

A. Proteinaceous in nature
B. A part of embryo
C. Found in gram seeds
D. Inner covering of endosperm fused with embryo

Answer

### Step-by-Step Solution:

1. **Understanding the Aleurone Layer**: The aleurone layer is a tissue found in the seeds of many plants, including gram seeds. It is important to identify its characteristics.

2. **Nature of the Aleurone Layer**: The aleurone layer is primarily proteinaceous in nature. This means it is rich in proteins, which serve as a source of nutrients for the developing embryo.

3. **Location of the Aleurone Layer**: The aleurone layer is located just beneath the seed coat and is part of the endosperm. It is not the outermost layer; instead, it is an inner layer of the endosperm.

4. **Function of the Aleurone Layer**: The primary function of the aleurone layer is to store proteins and enzymes that are crucial for the germination process. During germination, these proteins are broken down to provide energy and nutrients to the growing plant.

5. **Clarifying Misconceptions**: It is important to clarify that while the aleurone layer is involved in the storage of nutrients, it is not primarily composed of starch. The starchy part of the endosperm is separate from the aleurone layer.

6. **Conclusion**: In summary, the aleurone layer is proteinaceous, located within the endosperm of the seed, and plays a critical role in seed germination.