Which is active in Maize

Options

A. Maltase
B. Zymase
C. Diastase
D. Cotyledon

Answer

### Step-by-Step Solution:

1. **Identify the Context**: The question asks about what is active in maize. Maize is a type of seed that belongs to the monocotyledon group of plants.

2. **Understand the Structure of Maize Seed**: Maize seeds have a structure called the scutellum, which is the single cotyledon. The scutellum serves as a food reserve to nourish the developing embryo.

3. **Examine the Components of the Seed**: In addition to the scutellum, maize seeds contain an endosperm and an aleurone layer. Both of these structures play a role in providing nourishment to the embryo during germination.

4. **Identify the Role of the Aleurone Layer**: The aleurone layer contains starch, which is a reserve food material. This starch is crucial during the germination process.

5. **Determine the Enzyme Involved**: To digest the starch present in the aleurone layer, an enzyme called diastase is active. Diastase is responsible for breaking down carbohydrates, specifically starch, into simpler sugars.

6. **Evaluate the Options**:
- **Maltase**: This enzyme breaks down maltose, which is not relevant to maize seeds, making this option incorrect.
- **Zymase**: This is a complex of enzymes involved in fermentation, not directly related to maize seed germination, so this option is also incorrect.
- **Cotyledon**: While the scutellum is a cotyledon, it does not refer to an active enzyme or process, making this option incorrect as well.

7. **Conclusion**: The only option that is active and relevant to maize in the context of seed germination is diastase. Therefore, the correct answer is **C) Diastase**.