What this page covers
Practice Step 1-style biochemistry questions on Fanconi anemia / interstrand crosslink repair / bone marrow failure, including Child, short stature, thumb hypoplasia, hyperpigmented macules, macrocytic pancytopenia, hypocellular marrow, with emphasis on enzyme / mechanism 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.