Biochemistry In Ochronosis there is deficiency of which of the following enzymes? A Phenylalanine decarboxylase B Homogentisic acid oxidase C Alpha ketoglutarate decarboxylase D Glucocerebrosidase 💡 Explanation In Ochronosis there is deficiency of which of the following enzymes? ✓ Correct Answer: B. Homogentisic acid oxidase