本题目来源于试卷: SL HL Topic D2.1 Cell division，类别为 IB生物学
[问答题]
9. Explain how concentratf,idym )xsw 7s6 55qf/juit +d1fyt 5iikb bnw3:u29 u0n y(hzndnj,p7 ons of cyclins control the cell cycle.
参考答案: Different cyclins control different phases of the cell cycle.
Concentrations of cyclins rise and fall as a cell progresses through the cell cycle.
Threshold concentration of a cyclin is needed for a cell to enter the next stage of cell cycle.
Cyclin concentrations activate genes/enzymes.
Example, e.g. Cyclins cause productions of proteins need for the stage of mitosis.
本题详细解析:
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