一个被 15 N 标记的、含 500 个碱基对的 DNA 分子片段,其中一条链中 T+A 占 40% 。若将该 DNA 分子放在含 14 N 的培养基中连续复制 3 次,下列相关叙述正确的是
A.
该 DNA 分子的另一条链中 T+A 占 60%
B.
该 DNA 分子中含有 A 的数目为 400 个
C.
该 DNA 分子第 3 次复制时需要消耗 1200 个 G
D.
经 3 次复制后,子代 DNA 中含 14 N 的占 1/8
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【简答题】When I first got an e-mail account ten years ago, I received communications only from family, friends, and colleagues. Now it seems that every time I check my e-mail, I have an endless series of adver...
【简答题】When I first got an e-mail account ten years ago, I received communications only from family, friends, and colleagues. Now it seems that every time I check my e-mail,I have an endless series of advert...
【简答题】She had to choose between (give)_______ up he job or hiring a nanny. Tim has made the (decide)_______ to apply for a job in that company. We soon make (friend)_______ with the couple next door. He del...