A) urea cycle is operating
B) urea cycle may be operating
C) arginine is being converted into ornithine
D) arginine is being converted into citrulline
Correct Answer: C
Solution :
During urea cycle, the cytosolic enzyme arginase cleaves arginine to yield urea and ornithine. Ornithine is transported into the mitochondrion to initiate another round of the urea cycle.
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