Physiologically urea is produced by the action of an enzyme
Physiologically urea is produced by the action of an enzyme
The correct option is B Arginase
Urea is produced by the liver through urea
cycle. It starts with the condensation of ammonium ion with bicarbonate ion
which results the formation of carbamoyl phosphate in the presence of enzyme
carbamoyl phosphate synthase. Carbamoyl phosphate combines with ornithine to
form citrulline in presence of enzyme citrulline synthase or ornithine
transcarbamoylase. Citrulline diffuses into the cytosol. Citrulline combines
with the amino acid aspartate and argininosuccinate catalyzed by the enzyme
argininosuccinate synthase. The enzyme
argininosuccinase acts reversibly to cleave argininosuccinate into arginine
and fumarate. Arginine is lysed into ornithine and urea under the influence of
the enzyme arginase. So the correct answer is “arginase”.
Urea is produced by the liver through urea cycle. It starts with the condensation of ammonium ion with bicarbonate ion which results the formation of carbamoyl phosphate in the presence of enzyme carbamoyl phosphate synthase. Carbamoyl phosphate combines with ornithine to form citrulline in presence of enzyme citrulline synthase or ornithine transcarbamoylase. Citrulline diffuses into the cytosol. Citrulline combines with the amino acid aspartate and argininosuccinate catalyzed by the enzyme argininosuccinate synthase. The enzyme argininosuccinase acts reversibly to cleave argininosuccinate into arginine and fumarate. Arginine is lysed into ornithine and urea under the influence of the enzyme arginase. So the correct answer is “arginase”.
