Uric acid is formed from

Options

A. glucose
B. purines
C. proteins
D. pyrimidines

Answer

**Step-by-Step Solution:**

1. **Understanding Uric Acid**: Uric acid is a nitrogenous waste product that is formed in the body. It is important to identify the source of its formation.

2. **Identifying Uricotelic Organisms**: Organisms that excrete uric acid as their primary nitrogenous waste are known as uricotelic organisms. Examples include reptiles and birds.

3. **Source of Uric Acid**: In humans and certain arthropods (like insects), uric acid is produced through the metabolism of purines.

4. **Purines**: Purines are a type of nitrogenous base found in nucleotides, which are the building blocks of DNA and RNA. They are derived from the diet, including foods and drinks.

5. **Metabolism Process**: The metabolism of purines leads to the formation of uric acid. This process is crucial as it helps in the elimination of nitrogen waste from the body.

6. **Toxicity and Water Requirement**: Uric acid is less toxic compared to other nitrogenous wastes, such as urea, and requires less water for excretion, making it an efficient waste product for organisms that conserve water.

7. **Conclusion**: Therefore, the correct answer to the question "Uric acid is formed from" is **purines**.

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