Biochemistry Metabolism of Purines and Pyrimidines a93e604a Uric acid is formed by - A Catabolism of proteins B Catabolism of ketones C Catabolism of purines D Catabolism fo pyrimidines High-Yield Explanation Ans. is 'c' i.e., Catabolism of purines o Humans catabolize purines (adenine and guanine) to uric acid.