2023 · Q61
In humans, urea is mainly formed from the metabolism of which one of the following components of food?
general-sciencebiology-human-body
- AFatty acids
- BVitamins
- CAmino acids
- DGlucose
Explanation
Urea is synthesised in the liver through the urea (ornithine) cycle from ammonia, which is released by the deamination of amino acids, the nitrogenous end-products of protein metabolism. Fatty acids are oxidised to carbon dioxide and water, while vitamins and glucose do not yield nitrogenous waste convertible to urea. Hence urea is mainly formed from the metabolism of amino acids.