In ornithine cycle, which of the following wastes are removed from the blood –

Options

A. `CO_(2)` and ammonia
B. Ammonia and urea
C. `CO_(2)` and urea
D. Urea and urine

Answer

### Step-by-Step Solution:

1. **Understand the Ornithine Cycle**: The Ornithine cycle, also known as the Urea cycle, is a series of biochemical reactions that occur in the liver. Its primary function is to convert ammonia, which is toxic, into urea, which is less toxic and can be safely excreted from the body.

2. **Identify the Waste Products**: In the context of the Ornithine cycle, the main waste product that is removed from the blood is urea. Ammonia, which is produced as a byproduct of protein metabolism, is converted into urea during this cycle.

3. **Mechanism of the Cycle**: The cycle involves several steps where ammonia combines with carbon dioxide and other molecules to eventually form urea. This urea is then transported to the kidneys, where it is excreted in urine.

4. **Conclusion**: Therefore, the waste that is primarily removed from the blood in the Ornithine cycle is urea.

### Final Answer:
In the Ornithine cycle, the waste that is removed from the blood is **urea**.

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