Which pair is tyrosine derivative ?

Options

A. FSH and GH
B. Insulin and Glucagon
C. Calcitonin and Thyroxine
D. Thyroxine and Adrenaline

Answer

To determine which pair is a tyrosine derivative, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understand Tyrosine Derivatives**:
- Tyrosine is an amino acid that serves as a precursor for several important hormones. The most notable tyrosine derivatives include thyroid hormones (like thyroxine) and catecholamines (like adrenaline).

2. **Analyze Option A: FSH and GH**:
- FSH (Follicle Stimulating Hormone) and GH (Growth Hormone) are both proteinaceous hormones produced by the pituitary gland.
- **Conclusion**: Neither FSH nor GH is a tyrosine derivative. This option is incorrect.

3. **Analyze Option B: Insulin and Glucagon**:
- Insulin and glucagon are hormones produced by the pancreas that regulate blood sugar levels. They are also protein hormones.
- **Conclusion**: Neither insulin nor glucagon is a tyrosine derivative. This option is incorrect.

4. **Analyze Option C: Calcitonin and Thyroxine**:
- Calcitonin is a hormone involved in calcium regulation, while thyroxine (T4) is a thyroid hormone derived from tyrosine.
- **Conclusion**: Since calcitonin is not a tyrosine derivative, this option is also incorrect.

5. **Analyze Option D: Thyroxine and Adrenaline**:
- Thyroxine (T4) is a well-known hormone derived from tyrosine, and adrenaline (epinephrine) is a catecholamine also derived from tyrosine.
- **Conclusion**: Both thyroxine and adrenaline are tyrosine derivatives. This option is correct.

### Final Answer:
The correct pair that consists of tyrosine derivatives is **Option D: Thyroxine and Adrenaline**.

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