Which Nitrogenous Waste Has the Greatest Number of Nitrogen Atoms

Question

Which nitrogenous waste has the greatest number of nitrogen atoms?
A) ammonia
B) ammonium ions
C) urea
D) uric acid

Accepted Answer

Uric acid has the greatest number of nitrogen atoms (four) compared to the other nitrogenous wastes (ammonia has one, ammonium ions have one, and urea has two).