This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'The gene responsible for folic acid transpo is situated on which chromosome ? \nSelect and explain. \nA. 10, B. 5, C. X, D. 21', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 21[Ref : Folic acid transpo * Chromosome location -4 21 q 223. * Gene name --> SLC I 9AI solute carrier family 19 (folate transpoer), member * Gene product/function --) Transpoer for the intake of folate. Transpo of folate occurs by novel mechanism called potocytosis which functionally couples three components namely the folate receptor, the folate transpoer and v-type h+ pump. * Alleles --> A 80G single nucleotide polymorphism', 'role': 'assistant'}]