Question

Which of the following is a 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

The catabolic process involves the breakdown of the complex molecules into simpler molecules. When proteins, amino acids or nucleic acids are catabolized, 3 nitrogen containing excretory end products are formed ammonia, urea, and uric acid. Creatinine is a chemical waste product prduced by breakdown of creatine . It is produced mainly by muscle metabolism and by eating excess meat products. Kidneys filter creatinine through urine.

So, the correct answer is option D.