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Biology
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想請教這題

21. 若先將細菌培養於IN 的培養液,之後再移到含N 的培養液,第二子代的 DNA 比重 何者正確? (A)所有DNA皆為N (B)所有DNA 雙股皆為 “N-5N (C)1/2的DNA 雙股為 5N-5N (D)1/2的DNA雙股為 AN-N

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