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Micturition

Urea is produ...

Question

Urea is produced in mammals from

A

Ammonia released by oxidative amination

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B

Oxidative deamination of purines

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C

Breakdown of ornithine

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D

Breakdown of arginine

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Solution

The correct option is D Breakdown of arginine
Urea is manufactured in the liver is a cyclic chemical reaction called as the ornithine cycle. It was once thought to be produced directly from ammonia but it is now known to be produced from ammonia by way of amino acid arginine.
Therefore, the correct answer is option D.

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