Check out today’s Step 1 Qmax Question Challenge.
Know the answer? Post it below! Don’t forget to check back for an update with the correct answer and explanation (we’ll post it in the comments section below).
After a night of heavy drinking, a 37-year-old man experiences pain, warmth, swelling, and redness around his big toe, shown radiographically in the image. He had been previously warned against drinking heavily, as it could exacerbate the pain in his toe.
Which of the following enzymes is responsible for the final conversion of the product responsible for this patient’s pain?
A. Adenosine deaminase
B. Cystathionine synthase
C. Hypoxanthine guanine phosphoribosyltransferase
D. Phenylalanine hydroxylase
E. Xanthine oxidase
Want to know the ‘bottom line?’ Purchase a USMLE-Rx Subscription and get many more features, more questions, and passages from First Aid, including images, references, and other facts relevant to this question.
This practice question is an actual question from the USMLE-Rx Step 1 test bank. For more USMLE Step 1 prep, subscribe to our Flash Facts and Step 1 Express video series. Score the best deal on all three products with a Step 1 Triple Play Bundle.
Categories: USMLE-Rx Step 1 Practice Q's