Amides are the storage and transported forms of nitrogen because they –

Options

A. needs less ATP for their transport
B. contain high nitrogen as compare to amino acids
C. are transported through xylem tracheary elements
D. can easily be deaminated to form organic acids and ammonia

Answer

**Step-by-Step Text Solution:**

1. **Understanding Amides**: Amides are organic compounds that contain a carbonyl group (C=O) linked to a nitrogen atom (N). They are significant in biological systems as they serve as storage and transport forms of nitrogen.

2. **Nitrogen Content**: Amides have a high nitrogen content. When comparing amides to other nitrogen-containing compounds, such as amino acids or ammonia, amides typically contain more nitrogen atoms in their structure. This makes them efficient for nitrogen storage.

3. **Storage Efficiency**: The structure of amides allows them to store nitrogen in a compact form. This means that a single amide molecule can hold multiple nitrogen atoms, making it more space-efficient than other forms of nitrogen.

4. **Transport Mechanism**: In plants, nitrogen needs to be transported from one part to another, often from roots to leaves. Amides can be easily transported through the plant's vascular system (specifically the xylem) due to their stable structure and solubility in water.

5. **Comparison with Other Forms**: When comparing amides to amino acids, it is clear that amides can hold more nitrogen in a single molecule than amino acids can. This makes amides a preferred form for nitrogen storage and transport in plants.

6. **Conclusion**: Therefore, amides are the storage and transportable forms of nitrogen because they contain a higher nitrogen content compared to amino acids, allowing for efficient storage and transport within the plant.