What this page covers
Practice Step 1-style biochemistry questions on Isoniazid-induced B6 deficiency: ALAS reaction (succinyl-CoA + glycine), including Female TB patient on isoniazid, microcytic anemia, elevated iron/ferritin, dimorphic smear, neuropathy, with emphasis on metabolic consequence / lab finding and answer-choice reasoning.
How to use this page
Review the topic and reasoning focus, then practice Step 1-style questions inside BiochemStep. The question set emphasizes mechanism-first answer-choice reasoning rather than passive content review.