This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemistry of Nucleotides , Subject name: Biochemistry
[{'content': 'In DNA, Cytosine is paired with - \nSelect and explain. \nA. Thymine, B. Guanine, C. Ademine, D. Uracil', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Guanine o The sugar of DNA is deoxyribose. The purine bases in DNA are adenine (A) and Guanine (G) Q, and pyrimidine bases are thymine (T) and cytosine (C) Q. Uracil (U), a pyrimidine, is not found in DNAQ.o Adenine is always paired with thymine by formation of two hydrogen bonds and Guanine is always paired with cytosine by formation of three hydrogen bonds.Antiparallel strands of DNA", 'role': 'assistant'}]