What this page covers
Practice Step 1-style biochemistry questions on Beta-thalassemia / splice-site mutation / pre-mRNA splicing, including 8-month-old, Italian ancestry, severe microcytic anemia, absent HbA, elevated HbF, homozygous exon-intron junction mutation, 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.