Ureides have

Options

A. high N/C ratio
B. low N/C ratio
C. high `NH _2//C` ratio
D. low `NH _2//C` ratio

Answer

**Step-by-step Solution:**

1. **Understanding the Question:**
The question asks about "ureides" and their characteristics. Ureides are nitrogenous compounds that are important in the nitrogen metabolism of certain plants, particularly legumes.

2. **Identifying Ureides:**
Ureides are typically formed from the breakdown of purines and are a way for plants to transport nitrogen. They are primarily found in plants like legumes, which have symbiotic relationships with nitrogen-fixing bacteria.

3. **Characteristics of Ureides:**
- Ureides contain a carbonyl group (C=O) and an amine group (NH2).
- They are soluble in water, which allows for easy transport within the plant.
- Ureides are less toxic than ammonia, making them a safer form of nitrogen for plants to utilize.

4. **Conclusion:**
Ureides have nitrogen in their structure and are used by plants as a means of nitrogen transport and storage. They are particularly important for plants that rely on nitrogen fixation.

**Final Answer:**
Ureides have nitrogen in their structure and are important for nitrogen transport in plants.

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