Pyrimidine synthesis and nucleotide disorders
Watch the video here for free, with no account or subscription. Try a sample question; membership adds the companion chapter and full quiz.
Read deeper. Practice the reasoning.
The video above is free for everyone. Membership unlocks the companion chapter and the complete Step 1 style question block for this and other published lessons.
Unlock chapters & practiceAlready a member? Sign in
Apply the idea.
Choose an answer, then see the reasoning. The full question block is included with membership.
A 22-year-old man develops vomiting and confusion after beginning a high-protein diet. His family recalls similar, milder episodes during illnesses. Plasma ammonia is 318 µmol/L, plasma citrulline is markedly reduced, and urinary orotic acid is markedly increased. Hemoglobin and mean corpuscular volume are normal. Emergency treatment for hyperammonemia is begun.