Question

Which of the following is metabolic waste of protein metabolism?

• A. NH${}_3$, urea and CO${}_2$
• B. Urea, oxygen and N${}_2$
• C. Urea, ammonia and alanine
• D. Urea, ammonia and creatinine

Answer 1

The correct option is D Urea, ammonia and creatinine

• Animal accumulates compounds like ammonia, urea, uric acid, Creatinine, water and ions like Na+, K+, Cl, phosphate, sulfate, etc. by metabolic activities or by excess ingestion.
• Out of which ammonia and creatinine are released by the breakdown of proteins.
• Whereas creatinine is a breakdown product of creatine phosphate in muscle and is usually produced at a fairly constant rate by the body.
  

Therefore, the correct answer is option D.