<prompt> Purine metabolism produces -b-alanineNH3CO2Uric acid  <response>: Ans. is d i.e., Uric acid o Humans catabolize purines adenine and guanine to uric acid.o Humans catabolize purines to uric acid.o But, first purines are catabolized to xanthine, which is further catabolized to purine.o In mammals other than higher primates in non primate mammals, uric acid is converted to water soluble abandon by enzyme uncase. However, human lack uricase, therefore the end product of purine catablism is uric acid, which is excreted. 