Question

Major excretory nitrogenous waste in humans is

• A. Urea
• B. Uric acid
• C. Ammonia
• D. Creatinine

Answer 1

The correct option is A Urea

The major excretory product in humans is urea. The first step in the conversion of amino acids from protein into metabolic waste in the liver is the removal of the alpha-amino nitrogen, which results in ammonia. Because ammonia is toxic, it is converted into urea by humans. The urea is excreted in urine by the kidneys.

So, the correct answer is 'Urea'.