In the urea cycle, the urea-producing step involves the reaction of water with

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The urea-producing step in the urea cycle involves the conversion of arginine to urea, which is catalyzed by the enzyme arginase. This reaction releases urea and regenerates ornithine, which can then re-enter the urea cycle. The other choices listed, aspartate, argininosuccinate, and carbamoyl phosphate, are all intermediates in the urea cycle but do not directly participate in the urea-producing step.

In the Urea Cycle, the Urea-Producing Step Involves the Reaction