Which amino acids is required for synthesis of catecholamines?

Options

A. Glycine
B. Cystine
C. Arginine
D. Tyrosine

Answer

**Step-by-Step Solution:**

1. **Understanding Catecholamines**: Catecholamines are a group of hormones produced by the adrenal glands, specifically from the inner medulla. The two primary catecholamines are epinephrine (adrenaline) and norepinephrine (noradrenaline).

2. **Identifying the Source**: The adrenal glands, also known as suprarenal glands, are located above the kidneys. They have two main parts: the outer cortex and the inner medulla. Catecholamines are synthesized in the inner medulla.

3. **Amino Acid Derivation**: Catecholamines are derived from amino acids. To answer the question, we need to identify which amino acid is responsible for the synthesis of these hormones.

4. **Evaluating Options**: The question provides four options:
- Option 1: Glycine
- Option 2: Cysteine
- Option 3: Arginine
- Option 4: Tyrosine

5. **Analyzing Each Option**:
- Glycine is not involved in catecholamine synthesis.
- Cysteine is also not related to the production of catecholamines.
- Arginine does not play a role in the synthesis of catecholamines.
- Tyrosine is the correct answer, as it is the amino acid from which both epinephrine and norepinephrine are synthesized.

6. **Conclusion**: The amino acid required for the synthesis of catecholamines is Tyrosine. Therefore, the correct answer is Option 4: Tyrosine.

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