Which one of the following is a highly toxic nitrogenous substance?
Show Hint
- Ammonia
- Urea
- Uric acid
- Hippuric acid
The Correct Option is A
Solution and Explanation
To solve the problem, we need to identify which of the listed nitrogenous substances is highly toxic.
1. Understanding the Toxicity of Nitrogenous Substances:
Ammonia, urea, uric acid, and hippuric acid are all nitrogenous waste products produced by organisms. Among them, ammonia is the most toxic substance. It is highly toxic because it requires a large amount of water to be safely excreted and can disrupt cellular functions at low concentrations.
2. Analyzing the Options:
Let's evaluate the toxicity of each substance:
- Ammonia: Ammonia is highly toxic to most organisms and is excreted mainly by aquatic animals, which can dilute it in water.
- Urea: Urea is less toxic than ammonia and is excreted by mammals. It requires less water for excretion.
- Uric acid: Uric acid is less toxic than ammonia and is excreted by birds and reptiles as a paste to conserve water.
- Hippuric acid: Hippuric acid is a waste product excreted by humans and is not highly toxic.
3. Conclusion:
The most toxic nitrogenous substance among the options is ammonia.
Final Answer:
The correct answer is (A) Ammonia.
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