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The main nitrogenous waste in human urine is
AGlucose only
BUrea
CAmino acids only
DProtein only
Answer & Solution
Correct answer: B. Urea
1. The chapter section on substances to excrete lists urea, uric acid and ammonia.
2. In humans, the main nitrogenous waste in urine is urea.
3. It is produced in the liver from extra amino acids.
4. So option A is correct.
_Source: Selina Concise Biology Class 10, Ch 8 The Excretory System (Mistral OCR'd PDF), section 8.2_
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