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Gaokao Biology Practice Question

2.(3分)在前人进行的下列研究中,采用的核心技术相同(或相似)的一组 是() ①证明光合作用所释放的氧气来自于水 ②用紫外线等处理青霉菌选育高产青霉素菌株③用T2噬菌体浸染大肠杆菌证明DNA是遗传物质 ④用甲基绿和吡罗红对细胞染色,观察核酸的分布。

  1. A.①②
  2. B.①③
  3. C.②④
  4. D.③④

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