Question

The stage of ornithine cycle at which arginase enzyme is used

• A. Ornithine $\to$ Citrulline
• B. Arginine $\to$ Ornithine
• C. Cirtulline $\to$ arginosuccinic aicd
• D. Ornithine $\to$ urea

Answer 1

Answer: (D)

Ornithine $\to$ urea

Urea is synthesised in liver through ornithine cycle. It was discovered by Hans Krebs and Kurt Henseliet (1932). The enzyme arginase used in ornithine cycle cleaves arginine to form urea and ornithine. The urea is transported to kidneys for excretion.

So, the correct answer is option D.