1. A 34-year-old wom an recently diagnosed w ith iron de ciency anem ia started a treatm ent w ith ferrous sulfate. Which of the follow ing m echanism s was m ost likely involved in the delivery of...

1. A 34-year-old wom an recently diagnosed w ith iron de ciency anem ia started a treatm ent w ith ferrous sulfate. Which of the follow ing m echanism s was m ost likely involved in the delivery of iron to the patient’s erythroblasts? A. Lipid di usion B. Facilitated di usion C. Aqueous di usion D. Receptor-m ediated endocytosis E. Bulk ow transport 2. A 53-year-old m an recently diagnosed w ith pernicious anem ia started a treatm ent w ith vitam in B12. Which of the follow ing m olecular actions m ost likely m ediated the antianem ic e ect of the drug in this patient? A. Form ation of succinyl-coenzym e A (CoA) B. Hydroxylation of folic acid C. Dem ethylation of N5-m ethyltetrahydrofolate D. Hydroxylation of dihydrofolic acid E. Glycine form ation from serine