Through their experiments with DNA from the bacterium Escherichia coli, Meselson and Stahl showed that DNA replication is
A: conservative.；
B: dispersive；
C: duplicative.；
D: semi-conservative
A: conservative.；
B: dispersive；
C: duplicative.；
D: semi-conservative
举一反三
- 1966 Scientist Kiwako Sakab and Reiji Okazaki discovered fragments, now known as Okazaki fragments, during their research on DNA replication of Escherichia coli. They continued their research studying bacteriophage DNA replication in Escherichia coli. Which enzyme is used during replication to attach Okazaki fragments to each other? A: DNA ligase B: DNA polymerase C: RNA polymerase D: reverse transcript
- DNA的半保留复制是由Meselson和Stahl首先证明的。
- Meselson和Stahl利用15N标记大肠杆菌DNA的实验首先证明了下列哪一种机制？ A: Meselson和Stahl利用15N标记大肠杆菌DNA的实验首先证明了下列哪一种机制？ B: DNA的基因可以被转录为mRNA C: DNA的半保留复制机制 D: DNA全保留复制机制
- 1958年Meselson and Stahl利用N15标记大肠杆菌DNA的实验首先证明了下列哪一种机制？（ ）。
- 1958年Meselson和Stahl利用15N标记大肠杆菌DNA的实验首先证明了下列哪一种机制