Multiple choice

______ is the series of reactions which results in the production of urea.

  1. Krebs cycle

  2. TCA cycle

  3. EMP pathway

  4. Ornithine cycle

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

The urea cycle (also known as the ornithine cycle) is a cycle of biochemical reactions occurring in many animals. Organisms that cannot easily and quickly remove ammonia usually have to convert it to some other substance, like urea or uric acid, which are much less toxic. Insufficiency of the urea cycle occurs in some genetic disorders (inborn errors of metabolism), and in liver failure. The result of liver failure is accumulation of nitrogenous waste, mainly ammonia, which leads to hepatic encephalopathy.

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