Multiple choice

Urea is a source of

  1. nitrogen

  2. oxygen

  3. CO2

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Urea (CO(NH2)2) is a nitrogen-containing compound produced in the liver as a waste product of protein metabolism. It is the primary source of nitrogen excretion in mammals and contains approximately 46.7% nitrogen by mass.

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