本题目来源于试卷: Continuity and Change D.1 DNA Replication，类别为 IB生物学
[单选题]
The diagram below shows the DNA band pattern frkva0zp )od/9bh; u zv,om the s : eq fgqtg-8,vh4cmvv/eh 1+first two generations of a bacterial culture. Generation numbers are indicated at the bottomf,g /v418c eqhv et :qvs+hg-m of the diagram. Bacteria were grown before the experiment in a medium containing a heavy isotope of nitrogen, $^{15}$N, and then transferred to the medium with the light isotope, $^{14}$N which marked the beginning of the experiment (generation 0).
A. There are two bands; a band for the heavy $^{15}$N and a band for the light $^{14}$N
B. There are two bands; both bands contain half $^{14}$N and half $^{15}$N
C. There are two bands; a band for a hybrid of $^{15}$N - $^14$N DNA and a band for the light $^{14}$N molecule
D. There are two bands; both bands only contain $^{14}$N
参考答案: C
本题详细解析:
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