The blackening of urine when exposed to air i | vedclass

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(D) The condition described is Alkaptonuria,which is an inborn error of metabolism.It is caused by a deficiency of the enzyme homogentisate $1,2-$diox

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Homogentisic acid

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(D) The condition described is Alkaptonuria,which is an inborn error of metabolism.It is caused by a deficiency of the enzyme homogentisate $1,2-$dioxygenase.Due to this deficiency,homogentisic acid accumulates in the body and is excreted in the urine.When the urine is exposed to air,the homogentisic acid oxidizes and polymerizes to form a pigment similar to melanin,which turns the urine black.

The blackening of urine when exposed to air is a metabolic disorder in human beings. This is due to the presence of:

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