Q. The characteristic that is shared by urea, uric acid and ammonia is/are
(A) They are nitrogenous wastes.
(B) They all need very large amount of water for excretion.
(C) They are all equally toxic.
They are produced in the kidneys.

 1918  192 ManipalManipal 2009 Report Error

Solution:

Urea, uric acid and ammonia all are nitrogenous wastes. Ammonia is highly toxic and highly soluble in water, therefore, requires a larpg amount of water for excretion. Urea is less toxic and less soluble in water than ammonia. Uric acid crystals are non-toxic and almost insoluble in water.