Question

Metabolism of purine and pyrimidine structure

Answer 1

In contrast to purines, pyrimidines undergo ring cleavage and the usual end products of catabolism are beta-amino acids plus ammonia and carbon dioxide. Pyrimidines from nucleic acids or the energy pool are acted upon by nucleotidases and pyrimidine nucleoside phosphorylase to yield the free bases.

Answer 2

Answer:

ring cleavage and the usual end products of catabolism are beta-amino acids plus ammonia and carbon dioxide. ... The 4-amino group of both cytosine .