This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Basics of DNA, Subject name: Biochemistry
[{'content': 'Double stranded RNA exists in: \nSelect and explain. \nA. A-DNA like conformation, B. B-DNA like conformation, C. Z-DNA like conformation, D. None of these', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Double stranded RNA exists in A- DNA like conformation Usually RNA is single stranded, DNA is double stranded. But in few species, double stranded RNA is found e.g. Rotavirus. B-DNA A-DNA Z-DNA Base pairs/turn 10 11 12 Right/left handed Right Right Left with zigzag sugar-phosphate backbone Function Major DNA in cells Dehydrated DNA or in DNA-RNA regions or in Double stranded RNA Regulation of gene expression, paicularly in GC sequence (alternating Purine-Pyrimidine)', 'role': 'assistant'}]