Amides are:

Options

A. Not transported in plants
B. Deaminated keto acids
C. Storage form of nitrogen
D. precursors of amino acids

Answer

**Step-by-Step Solution:**

1. **Understanding Amides**: Amides are organic compounds that are derived from amino acids. They are formed when the hydroxyl group (-OH) of a carboxylic acid is replaced by an amino group (-NH2).

2. **Structure of Amides**: In the structure of an amide, you have a carbonyl group (C=O) attached to a nitrogen atom (N). This nitrogen can have one or two additional hydrogen atoms or can be bonded to another carbon chain.

3. **Functions of Amides**: The primary functions of amides in plants include the storage of excess nitrogen and its transport. They play a crucial role in nitrogen metabolism within the plant.

4. **Evaluating Options**:
- "Not transported in plant" - This is incorrect as amides are indeed transported.
- "Deaminated keto acids" - This does not accurately describe amides.
- "Storage form of nitrogen" - This is correct as amides serve as a storage form of nitrogen.
- "Precursor of amino acids" - While amides are related to amino acids, they are not directly precursors.

5. **Conclusion**: Based on the functions and characteristics of amides, the correct answer to the question is that amides are the "storage form of nitrogen."

**Final Answer**: Amides are the storage form of nitrogen.

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