<prompt> The main catabolic productproducts of purine nuleotides in humans is which one of the following:Ammonia CO2AmmoniaUric AcidCO2 and Water  <response>: Ans. c Uric AcidRef: Harpers Biochemistry, 30th edn. pg. 347-357Purines are metabolized by several enzymes:GUANINE A nuclease frees the nucleotide A nucleotidase creates guanosine Purine nucleoside phosphorylase converts guanosine to guanine Guanase converts guanine to xanthine Xanthine oxidase a form of xanthine oxidoreductase catalyzes the oxidation of xanthine to uric acidADENINE A nuclease frees the nucleotide A nucleotidase creates adenosine, then adenosine deaminase creates inosine Alternatively, AMP deaminase creates inosinic acid, then a nucleotidase creates inosine Purine nucleoside phosphorylase acts upon inosine to create hypoxanthine Xanthine oxidoreductase catalyzes the biotransformation of hypoxanthine to xanthine Xanthine oxido-reductase acts upon xanthine to create uric acid 