Metabolism USMLE Step 1 Practice Question
A 27 year old woman is evaluated for diffuse hair loss and a scaly dermatitis around the eyes, nose, and mouth. She recently completed a prolonged course of broad spectrum antibiotics after complicated appendicitis and has also been drinking several raw egg white protein shakes daily. Which of the following enzyme classes is most likely impaired in this patient?
Answer choices
- AOxidative decarboxylases
- BCarboxylasesCorrect answer
- CHydroxylases
- DTransaminases
- ETransferases using tetrahydrofolate
- FFAD-dependent oxidoreductases (riboflavin)
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