Question

List three forms of nitrogen waste.
1) Ammonia
2) Uric Acid
3) Urea

--> Which of these three is the least toxic?
--> Which of these three takes the most amount of energy to produce?

Answer 1

Answer

The three forms of nitrogenous waste are :

1) Ammonia : It is generated due to nitrogen metabolism.

2) Uric Acid : It is an end product formed by catabolism of purine nucleotides.

3) Urea : It is produced at the end of metabolism of amino acids.

The least toxic nitrogenois waste among these three is : Uric acid

The nitrogenous waste that takes the most amount of energy to produce is : Uric acid

• Uric acid is the least toxic among all.
• It need very little amount of water for excretion.
• Uric acid used most of the energy in its production.
• The most toxic among all is ammonia.