Question

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

Answer 1

Answer:

Explanation:

Number 1: The answer is A; Ariginase is responsible for the release of urea as product.

Number 2: The answer is B; Argininosuccinate synthetase requires ATP.

Number 3: The answer is D; Arginase is located in the mitochondrion

Number 4: The answer is B; Ornithine produced in the cytosol must first cross the inner mitochondrial membrane into the mitochondrial matrix where it is carbamylated