Nucleic acids and protein synthesis Quiz (2) Biology AS & A Level
CIE
AS & A Level
Biology (9700)
فروردین
2010
شامل مباحث:
UNIT 6: Nucleic acids and protein synthesis
تعداد سوالات: 20
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
25 دقیقه
پیش نمایش صفحه اول فایل
omer uner The bacterium Escherichia coli divides once every 50 minutes at ${36^ \circ }C$.
E. coli were grown on a medium containing only heavy nitrogen, ${}^{15}N$, until all of the bacterial DNA contained heavy nitrogen.
Some of the bacteria were moved from a heavy nitrogen medium and cultured in a medium with only light nitrogen, ${}^{14}N$ (0 minutes).
These bacteria continued to reproduce and samples were extracted and centrifuged at…
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