Biochemistry Metabolism of nucleic acids 8d776379 Rate limiting step in pyrimidine synthesis A Dihydro-orotase B Ornithine transcarbomoylase C Aspaate transcarbomoylase D Carbamoyl phosphate synthase-I High-Yield Explanation Ref-D.M.Vasudevan 7/e p506 Aspaatetranscarbamylase catalyses a committed step in pyrimidine metabolism by conveing carbamoyl phosphate into carbamoyl aspaate