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Excretory Products and their Elimination — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYExcretory Products and their Elimination1 Mark
MCQ
The least toxic nitrogen waste present in urine is:
  • A
    Ammonia
  • B
    Allantois
  • C
    Urea
  • D
    Uric acid
✓

Answer

  1. Uric acid

Explanation:

The byproducts of protein metabolism are nitrogen and ammonia. Ammonia is very toxic to the body. Hence it is converted in the liver to less toxic products like urea and uric acid. Uric acid is the least toxic metabolic product of protein metabolism, which gets excreted by the urine. 

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