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Hi, I need help on a biochem study question. Starting with carbamoyl phosphate,

ID: 73006 • Letter: H

Question

Hi, I need help on a biochem study question.

Starting with carbamoyl phosphate, place the sequence of events for the urea cycle in the correct order:

1) Argininosuccinase hydrolyzes its substrate to arginine and fumarate.
2) Ornithine and urea are the products of the reaction catalyzed by arginase.
3) Citrulline is combined with aspartate in the presence of argininosuccinate synthetase to provide argininosuccinate.
4) Ornithine transcarbamoylase catalyzes the transfer of a carbamoyl group to ornithine.

2-3-1-4 2-4-3-1 4-1-3-2 4-3-1-2

Explanation / Answer

4) Ornithine transcarbamoylase catalyzes the transfer of a carbamoyl group to ornithine.

3) Citrulline is combined with aspartate in the presence of argininosuccinate synthetase to provide argininosuccinate.

1) Argininosuccinase hydrolyzes its substrate to arginine and fumarate.

2) Ornithine and urea are the products of the reaction catalyzed by arginase.

Hence, the correct order is 4-3-1-2

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