Question

The enzyme carbamoyl phosphate synthase Il is associated with? ОА. gluconeogenesis, B. pyrimidine synthesis, Oglyoxylate cycle, OD.purine synthesis, E. urea cycle, OF. all of the above.

Answer 1

1. b) It is associated with the pyrimidine synthesis.

2.a) In de novo generation of purines, the enzyme amidophosphoribosyltransferase acts upon Phosphoribosyl pyrophosphate to create phosphoribosylamine. PRPP is the source of the sugar for purine nucleotides

3.f) Man and other primates excrete uric acid as the final product of purine catabolism as the result of lacking uricase. In mammals it is allantoin.

4. c) The enzyme in the IMP to AMP pathway is adenylosuccinate synthetase which catalyzes a regulated reaction in the pathway.