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A piece of single-stranded nucleic acid contains adenine, cytosine, and guanine. Which piece or pieces of...

A piece of single-stranded nucleic acid contains adenine, cytosine, and guanine. Which piece or pieces of information below would tell you if it was RNA or DNA?

The ratio of cytosine to guanine
Whether uracil is present
Whether the pentose sugars in the nucleotides have 3' OH groups
The ratio of adenine to cytosine
The number of phosphate groups in a piece of the nucleic acid 100 nucleotides long
Whether the pentose sugars in the nucleotides have 2' OH groups
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