Multiple choice

The presence of arginase confirms that :

  1. urea cycle is operating

  2. urea cycle may be operating

  3. arginine is being converted into ornithine

  4. arginine is being converted into citrulline
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

During urea cycle, the cytosolic enzyme arginase cleaves arginase to yield urea and ornithine. Ornithine is transported into the mitochondrion to initiate another round of the urea cycle.

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