Some pepo are bitter in taste due to

Options

A. Allyl sulphides
B. External effects
C. Tetracyclic triterpene
D. None of these

Answer

To solve the question regarding why some pepo are bitter in taste, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Pepo**:
- Pepo is a type of fruit that is typically fleshy and is developed from a syncarpous ovary. It is important to recognize that pepo fruits have a specific structure and composition.

2. **Identifying the Components of Pepo**:
- A pepo fruit consists of three layers: the exocarp (outer skin), mesocarp (fleshy middle), and endocarp (inner layer). The mesocarp and endocarp are usually edible and juicy.

3. **Exploring the Cause of Bitterness**:
- The bitterness in some pepo fruits is attributed to the deposition of certain chemical compounds. It is essential to identify these compounds to understand the reason behind the bitterness.

4. **Evaluating the Options**:
- The options given are:
- Allyl sulphides
- External effects
- Tetracyclic triterpene
- None of these
- Among these, we need to determine which one is responsible for the bitterness.

5. **Identifying the Correct Compound**:
- Research and studies indicate that tetracyclic triterpenes are known to cause bitterness in certain fruits, including some pepo varieties. This is due to their chemical structure and properties.

6. **Conclusion**:
- Based on the understanding that tetracyclic triterpenes lead to the bitterness in some pepo fruits, we can conclude that the correct answer to the question is option 3: tetracyclic triterpene.

### Final Answer:
The bitterness in some pepo is due to **tetracyclic triterpene**.

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