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: Biochemistry
[{'content': 'In SDS-PAGE (Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis) proteins are separated on basis ofa) Massb) Chargec) Densityd) Molecular weighte) Solubility \nSelect and explain. \nA. b, B. ad, C. ac, D. ab', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In SDS-PAGE the separation of molecules depends mainly on their molecular size.\nTherefore, SDS-PAGE is commonly used for molecular weight determination.', 'role': 'assistant'}]