Select an incorrect match

Options

A. Trytophan - Auxin
B. Methionine - Ethylene
C. tRNA - Cytokinin
D. Violaxanthin - `GA_(3)`

Answer

To solve the question of selecting an incorrect match between precursors and plant hormones, we will analyze each pair given in the question step by step.

### Step 1: Analyze the first pair - Auxin
- **Precursor**: Tryptophan
- **Hormone**: Auxin
- **Analysis**: Tryptophan is indeed the correct precursor for auxin production. This pair is correctly matched.

### Step 2: Analyze the second pair - Ethylene
- **Precursor**: Methionine
- **Hormone**: Ethylene
- **Analysis**: Methionine is a sulfur-containing amino acid and is correctly identified as the precursor for ethylene. This pair is also correctly matched.

### Step 3: Analyze the third pair - Cytokinin
- **Precursor**: Adenine
- **Hormone**: Cytokinin
- **Analysis**: Adenine, a purine derivative, is the correct precursor for cytokinin. This pair is correctly matched.

### Step 4: Analyze the fourth pair - Gibberellic Acid (GA3)
- **Precursor**: Viola xanthine
- **Hormone**: Gibberellic Acid (GA3)
- **Analysis**: The correct precursor for gibberellic acid (GA3) is mevalonic acid, not viola xanthine. Therefore, this pair is incorrectly matched.

### Conclusion
The incorrect match is the fourth pair: Viola xanthine and GA3.

### Final Answer
The incorrect match is: **Viola xanthine - GA3**.

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