Mendel obtained wrinkled seeds in pea due to deposition of sugars instead of starch. It was due to which enzyme :-

Options

A. Amylase
B. Invertase
C. Diastase
D. Absence of starch branching enzyme

Answer

To answer the question regarding the enzyme responsible for the deposition of sugars instead of starch in wrinkled seeds in pea plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Phenomenon**: Mendel observed that wrinkled seeds in pea plants were due to a specific biochemical process. The wrinkled appearance is linked to the type of carbohydrate stored in the seeds.

2. **Identifying the Carbohydrates**: In pea seeds, starch is the primary storage carbohydrate. However, in wrinkled seeds, there is a deposition of sugars instead of starch.

3. **Role of Enzymes**: Enzymes are biological catalysts that facilitate biochemical reactions. In this case, we need to identify which enzyme is responsible for the conversion or lack of conversion of starch.

4. **Analyzing the Options**:
- **Amylase**: This enzyme breaks down starch into simpler sugars (like glucose). However, it does not explain the wrinkled seed phenotype directly.
- **Invertase**: This enzyme hydrolyzes sucrose into glucose and fructose. It is not directly related to starch metabolism.
- **Diastase**: A group of enzymes that also catalyze the breakdown of starch into maltose. Again, this does not directly relate to the wrinkled seed trait.
- **Absence of Starch-Branching Enzyme**: This enzyme is crucial for the proper formation of branched starch molecules. Its absence leads to the accumulation of unbranched starch, which does not absorb water well, resulting in the wrinkled appearance of seeds.

5. **Conclusion**: The correct answer is the **absence of starch-branching enzyme**. This absence leads to the accumulation of sugars instead of starch, causing the seeds to wrinkle.

### Final Answer:
The enzyme responsible for the deposition of sugars instead of starch in wrinkled seeds in pea plants is the **absence of starch-branching enzyme**.