問題詳情
22.tE. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more
generations (two rounds of DNA replication). DNA extracted from these cells is centrifuged. What
density distribution of DNA would you expect in this experiment?
(A) one high-density and one low-density bandt
(B) one intermediate-density band
(C) one intermediate-density and one low-density band
(D) one low-density band
參考答案
答案：99
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中