DNA and RNA are chemically very similar. The primary structures of both are liner
polymers composed of monomers callednucleotides. DNA and messenger RNA
function primarily as informational molecule,...
| English Article | Word Count | Duration | Accuracy | Speed | Backspace | Error | Slogan |
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| 《Structure of Nucleic Acids》 | 596字 | 4.2分钟 | 100% | 138 CPM | 28 次 | 0 | 及格，继续努力！ |
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