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Gaokao Biology Practice Question

关于 DNA 和 RNA 的叙述,正确的是

  1. A.DNA 有氢键, RNA 没有氢键
  2. B.一种病毒同时含有 DNA 和 RNA
  3. C.大肠杆菌和酵母菌中既有 DNA 也有 RNA
  4. D.叶绿体、线粒体和核糖体都含有 DNA

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