Nitrogenous
wastes are produced due to the metabolism of………
a) proteins
b) nucleic acid
c) carbohydrates and lipids
d) both a and b
Surplus amino acids in the body are broken down to form urea in…….
a) spleen
b) kidneys
c) liver
d) pancreas
Which of the following is/are the primary nitrogenous waste/s produced?
a) ammonia
b) urea
c) uric acid
d) all of these
Some animals excrete ammonia directly while others convert it into……
a) water
b) urea
c) uric acid
d) both b and c
In nitrogenous wastes, which one of the following is very toxic?
a) urea
b) ammonia
c) uric acid
d) none of these
Explanation: Ammonia is highly toxic and has a high solubility in water. Urea is less soluble and less toxic than ammonia.
The removal of nitrogenous waste is called…
a) excretion
b) respiration
c) urination
d) perspiration
