Nucleic acids and protein synthesis Quiz (3) Biology AS Level
Cambridge
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 DNA replication in bacteria was investigated. Bacteria were grown in a medium with only heavy
nitrogen, ${}^{15}N$, until all of the bacterial DNA was heavy.
These bacteria were moved from the heavy nitrogen medium and cultured in a medium with only
light nitrogen, ${}^{14}N$. This formed the first generation.
The bacteria continued to reproduce, and a sample of bacteria was collected from the second
generation and the DNA analysed.
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