Multiple choice

In ornithine cycle, which of the following wastes are removed from the blood?

  1. CO2 and ammonia

  2. Ammonia and urea

  3. CO2 and urea

  4. Urea and urine

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A Correct answer
Explanation

 In ornithine cycle, CO2 and ammonia wastes are removed from the blood. In mammals, this cycle takes place primarily in the liver, and to a lesser extent in the kidney.