Removal of amino group from an amino acid is called :

Options

A. Amination
B. Deamination
C. Excretion
D. Defaecation

Answer

To solve the question "Removal of amino group from an amino acid is called:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms:**
- The question provides four options: amination, deamination, excretion, and defecation. We need to understand what each term means to identify the correct answer.

2. **Define Amination:**
- Amination is the process of introducing an amino group into an organic molecule. Since we are looking for the removal of an amino group, this option does not fit.

3. **Define Deamination:**
- Deamination is the process of removing an amino group from an amino acid. This is the process we are looking for, as it directly addresses the removal of the amino group.

4. **Define Excretion:**
- Excretion refers to the process of eliminating metabolic waste from the body. While it is related to waste removal, it does not specifically refer to the removal of an amino group from an amino acid.

5. **Define Defecation:**
- Defecation is the discharge of feces from the body. This term is unrelated to amino acids or their amino groups.

6. **Conclusion:**
- Based on the definitions, the correct answer to the question is **deamination**, as it specifically refers to the removal of the amino group from an amino acid.

### Final Answer:
The removal of the amino group from an amino acid is called **deamination**.

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