[问答题]
The graph below shows the rel
brs ;kmrkptxa3- 3(v:ative
6assaka f is- zh2,+s6amount of DNA in one cell during one complete cell cycle. Each letter represents one stage of the
ih k+s2afsza,6sas6- cell cycle.
1.1.State which stage of mitosis or interphase is represented by stage B in the graph.
1.2.Explain your answer to part (i).
1.3.Bortezomib is an anticancer medication and arrests cells in the G$_2$ phase. If a cell shown in this graph began the cell cycle at A with 3 relative units of DNA, and Bortezomib was applied to the cell culture at stage A as well, estimate the relative amount of DNA in the cell at the end of C.
2.Explain why the amount of DNA in one cell remains the same in stages C and D.
3.The diagram above shows cells in different stages of mitosis. Label one cell that is in prophase and one cell that is in anaphase.
