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26-10-2022
Biology

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Which of the following best describes a structural difference between dna and rna?
a. DNA is usually double-stranded, while RNA never forms a double-stranded structure. b. In RNA, adenine pairs with thymine, while in DNA, adenine pairs with uracil. c. In RNA, phosphate and hydroxyl groups are attached to the 5' and 3' ends, respectively. The opposite is seen in DNA. d. The sugar in DNA lacks a hydroxyl group on the second carbon of the ring, whereas the sugar in RNA has it.

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