Excretory Products and their Elimination

Conversion of ammonia to urea is done by

1. ornithine cycle
2. arginine cycle
3. fumaric cycle
4. citrulline cycle

Answer

(1) ornithine cycle

Solution

As per NCERT, in ureotelic animals the ammonia produced by metabolism is converted into urea in the liver.

⇒ This conversion occurs through the ornithine cycle (urea cycle, Krebs–Henseleit cycle), in which ornithine citrulline arginine urea + ornithine.

Answer: (1)