Omithine cycle is realted to

Options

A. Respiration
B. Excretion
C. Digestion
D. Nutrition

Answer

### Step-by-Step Solution:

1. **Identify the Cycle**: The question asks about the "Ornithine cycle." This cycle is also known as the urea cycle.

2. **Understand the Function**: The urea cycle is a series of biochemical reactions that convert ammonia, which is toxic, into urea, which is less toxic and can be excreted from the body.

3. **Relation to Excretion**: The primary function of the ornithine cycle (urea cycle) is related to the process of excretion. It helps in the removal of excess nitrogen from the body.

4. **Biochemical Reactions**: The cycle involves several biochemical reactions that take place in the liver, where ammonia is produced from the breakdown of amino acids and subsequently converted into urea.

5. **Conclusion**: Therefore, the ornithine cycle is related to the process of excretion, specifically the conversion of ammonia to urea for safe removal from the body.

### Final Answer:
The Ornithine cycle is related to the process of excretion, specifically in the conversion of ammonia to urea.

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