This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of Purines and Pyrimidines, Subject name: Biochemistry
Pyrimidine metabolism end product - 
Select and explain. 
A. Urea, B. Uric acid, C. Beta alanine, D. Allantoin
C: Beta alanine
Answer: C: Beta alanine 
Explanation: Ans. is 'c' i.e., Beta alanine o Unlike the purine which are degraded to sparingly soluble product, uric acid, the end products of pyrimidine catabolism are highly water soluble : CO2, NH3, b- alanine and b- aminoisobutyrate.o Pseudouridine is excreted unchanged as it cannot be catabolized in human. Humans have no enzyme that can catabolize pseudouridine derived from degradation of t-RNA.