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  • 匿名
关注：1 2013-05-23 12:21

求翻译：(6) Take the strip of paper and twist it one complete turn. Attach the two ends with a piece of tape. Take a scissor and cut carefully along the center line that you drew, and pull gently. The two loops are linked by a chain of two. Since each loop represents the covalent backbone of a DNA strand, the two strands are 是什么意思？

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(6) Take the strip of paper and twist it one complete turn. Attach the two ends with a piece of tape. Take a scissor and cut carefully along the center line that you drew, and pull gently. The two loops are linked by a chain of two. Since each loop represents the covalent backbone of a DNA strand, the two strands are
问题补充：
  • 匿名
2013-05-23 12:21:38
（6）以纸条捻一个完整的turn。重视同一块胶带的两端。剪刀和仔细削减沿着你画的中心线，轻轻拉。两个环路相连的两个链。由于每个循环的DNA链的共价骨干，两条链“拓扑债券”联系在一起。你不能单独的股，除非你砍其中之一（也就是说，你必须打破共价键）。不管你怎
  • 匿名
2013-05-23 12:23:18
  • 匿名
2013-05-23 12:24:58
  • 匿名
2013-05-23 12:26:38
  • 匿名
2013-05-23 12:28:18
 
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