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Blacking of urine when exposed to air a ...

Blacking of urine when exposed to air a metabolic disorder in human beings. This is due to

A

Phenylalanine

B

Tyrosine

C

Valine replacing glutamine

D

Homogentistic acid

Text Solution

Verified by Experts

The correct Answer is:
D
Alkaptonuria is a rare genetic disorder that causes homogentisic acid to build up in our body. It causes urine to turn blue or black when exposed to air. It also causes bones and cartilage to become discoloured.
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