What this page covers
Practice Step 1-style biochemistry questions on Niemann-Pick disease type A due to sphingomyelinase deficiency, including Infant with developmental regression, hypotonia, hepatosplenomegaly, cherry-red macula, and foam cells has Niemann-Pick disease type A, 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.