Multiple choice

Urea formation takes place through :

  1. Nitrogen cycle

  2. Ornithine cycle

  3. Cori cycle

  4. Krebs' cycle

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Urea is formed in liver through ornithine cycle. The liver cells continuously release urea into the blood. Now, kidneys withdraw it from the blood to excrete in urine.