Question:
Ornithine cycle is related with excretion
Ornithine cycle is related with excretion
Updated On: Aug 15, 2022
- urea and water
- $CO_2$ & $NH_3$
- urea and amino adds
- urea and $CO_2$
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The Correct Option is D
Solution and Explanation
Ornithine cycle removes urea and $CO_2$. Ureotelic animals which excrete urea, synthesize it from ammonia in liver cells. With the help of a number of enzymes and $ATP$, two molecules of ammonia are combined with a molecule of $CO_2$ to form urea. Formation and transformation of three amino adds namely ornithine, citrulline and arginine, one after the other constitute the major steps in this cycle. That is why, it is known as ornithine, arginine or urea cycle. It is also referred as Kreb-Henseleit cycle after the names of its discoverers.
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Concepts Used:
Excretory products and their elimination
The physiological process of the elimination of metabolic waste from the body is called excretion. The excretory products comprise amino acids, carbon dioxide, urea, uric acid, water, and ammonia. Some of the Molluscs and Echinoderms excrete waste products from the body in the form of amino acids. Ammonia is the foremost excretory product in animals, it is derived from the proteins exists in the food we eat.
Excretory Products in Different Organisms:
Read More: Excretion in Human Beings