Why does the human body convert ammonia into urea?
Answer and explanation
Correct answer: Because urea is less toxic than ammonia and can be excreted
The governing concept is detoxification of nitrogenous waste. Breakdown of amino acids can produce ammonia, which is highly toxic and cannot safely accumulate in body tissues. In the liver, ammonia is converted into urea through the urea cycle. Urea is much less toxic, dissolves readily in water, and can be transported in blood to the kidneys for urinary excretion. Thus option A is correct; the remaining options confuse urea with nutrition, respiration, or photosynthesis.
Frequently asked questions
What is the correct answer to this question?
Because urea is less toxic than ammonia and can be excreted
Why is this the correct answer?
The governing concept is detoxification of nitrogenous waste. Breakdown of amino acids can produce ammonia, which is highly toxic and cannot safely accumulate in body tissues. In the liver, ammonia is converted into urea through the urea cycle. Urea is much less toxic, dissolves readily in water, and can be transported in blood to the kidneys for urinary excretion. Thus option A is correct; the remaining options confuse urea with nutrition, respiration, or photosynthesis.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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