In Ornithine cycle which one pair of the following wastes as 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. **Understanding the Ornithine Cycle**: The ornithine cycle, also known as the urea cycle, is a series of chemical reactions that occur in the liver. Its primary function is to convert toxic ammonia, a byproduct of protein metabolism, into urea, which is less toxic and can be excreted from the body.

2. **Identifying the Waste Products**: In the context of the ornithine cycle, the main waste products involved are ammonia and carbon dioxide. Ammonia is produced from the breakdown of amino acids, while carbon dioxide is a byproduct of cellular respiration.

3. **Conversion Process**: During the ornithine cycle, ammonia combines with carbon dioxide to form urea. This process helps in detoxifying ammonia, which is highly toxic to the body. The cycle effectively removes two molecules of ammonia and one molecule of carbon dioxide to produce one molecule of urea.

4. **Final Waste Removal**: The urea produced in the ornithine cycle is then transported to the kidneys, where it is excreted from the body through urine. Therefore, the ornithine cycle plays a crucial role in the elimination of nitrogenous wastes from the blood.

5. **Conclusion**: The correct pair of wastes that are removed from the blood in the ornithine cycle is ammonia and carbon dioxide.

**Final Answer**: The pair of wastes removed from the blood in the ornithine cycle is **ammonia and carbon dioxide**.

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