Select an incorrect match

Options

A. ABA - Violaxanthin
B. Ethylene - Methionine
C. `GA_(3)` - Acetyl CoA
D. Cytokinin - terpenes

Answer

To solve the question of selecting an incorrect match among the given options, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Identify the options provided:**
- A) Abscisic acid - Eucalyptus
- B) Ethylene - Methionine
- C) Gibberellic acid - Acetyl coenzyme A
- D) Cytokinin - Terpenes

2. **Analyze each option:**
- **Option A: Abscisic acid - Eucalyptus**
- Eucalyptus is indeed a precursor of abscisic acid, especially in stressed leaves. This match is **correct**.

- **Option B: Ethylene - Methionine**
- Ethylene is synthesized from methionine through a series of reactions involving the enzyme that catalyzes the breakdown of methionine. This match is **correct**.

- **Option C: Gibberellic acid - Acetyl coenzyme A**
- Gibberellic acid (GA) is synthesized from acetyl coenzyme A. This match is **correct**.

- **Option D: Cytokinin - Terpenes**
- Cytokinins are primarily derived from adenine, not terpenes. This match is **incorrect**.

3. **Conclusion:**
- The incorrect match is **D) Cytokinin - Terpenes**.

### Final Answer:
The incorrect match is **D) Cytokinin - Terpenes**.

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