This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Molecular Genetics, Subject name: Biochemistry
[{'content': 'Two strands of the DNA are joined by: \nSelect and explain. \nA. Glycosidic bond, B. Hydrogen bond, C. Covalent bond, D. Ionic bond', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. B. Hydrogen bondBonds in the DNABetween nucleotides- 3' to 5' Phosphodiester bondBetween the DNA Hydrogen bondBetween base and Sugar beta N Glycosidic bond, Nucleoside and Phosphate Ester bondBase stacking by van der Waals forces", 'role': 'assistant'}]