The urea cycle rids in the body of excess nitrogen by converting it to a non-toxic form that can be excreted in the urine. it utilize one nitrogen atom from carbonyl phosphate and one nitrogen atom from asparate.

1.which enzyme releases urea a product? a) ornithine transcarbamoylase b) argininosuccinate synthetase c) argininosuccinase d) arginase

2. which enzyme requires atp a) ornithine transcarbamoylase b) argininosuccinate synthetase c) argininosuccinase d) arginase

3- which enzyme is located inside the mitochondrion? a) ornithine transcarbamoylase b) argininosuccinate synthetase c) argininosuccinase d) arginase

4- which intermediates of the urea cycle must cross the mitochondrial membrane? a) argininsuccinate b) ornithine c) arginine d) citrulline