<prompt> Which is a product of purine metabolism?Uric acidUreaXanthineBeta alanine  <response>: Uric acid is the common end product of purine catabolism. However, in non-primate mammals, Allantoin is the end product of purine catabolism as an extra enzyme, Uricase is present. OTHER OPTIONS: OPTION B: The end products of pyrimidine catabolism are NH3, CO2 beta alanine for Cytosine, Uracil Option C - Xanthine is an intermediate of catabolism of purines. Xanthine gets conveed to uric acid by Xanthine Oxidase. 