In case of alkaptonuria, homogenti-sic acid is excreted in urine in large amounts. The development of this disease is associated with a disorder of metabolism of the following amino acid:

Answer options

1. Asparagine
2. Phenylalanine
3. Alanine
4. Tyrosine
5. Methionine

Explanation

In alkaptonuria, the enzyme (homogentisate 1,2- dioxygenase) is involved in the metabolism of phenylalanine and tyrosine. And also tyrosine is a product of phenylalanine. So, there’s excess tyrosine. So the RIGHT ANSWER IS "Tyrosine".