Question

Give an account of ornithine cycle of urea synthesis in animals

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Answer 1

Answer:

The urea cycle (also known as the ornithine cycle) is a cycle of biochemical reactions that produces urea (NH2)2CO from ammonia (NH3). This cycle occurs in ureotelic organisms.

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Reactions.

Step3Reactantscitrulline + aspartate + ATPProductsargininosuccinate + AMP + PPiCatalyzed byASSLocationcytosol

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Answer 2

A N S W E R :

The " Ornithine cycle " of urea synthesis in animals is basically the cycle which represents the datoxification of ammonia.

E X T R A I N F O R M A T I O N :

• The Ornithine cycle is also known as " Urea cycle " or " Krebs - Henseleit cycle ".

• The Ornithine cycle was discovered by " Hans Adolf Krebs " and " Kurt Henseleit " in the 1932.

• The Ornithine cycle takes place in the liver.

• The Ornithine cycle involves the union of two molecules of ammonia and one molecule of carbon dioxide.

• The Ornithine cycle helps to remove to waste products from the liver, namely- " Ammonia " and " Carbon dioxide ".

• Ornithine is a non - protein amino acid.

• Ornithine reacts with one molecule of Ammonia and one molecule of Carbon dioxide to give " Citrulline ".

• Citrulline reacts with a second molecule of ammonia to give " Arginine ".

• The enzyme which takes place in the Ornithine cycle is known as " Arginase ".